S75-24007 (24 March 1975) --- The Saturn 1B space vehicle for the Apollo-Soyuz Test Project mission, with its launch umbilical tower, rides atop a huge crawler-transporter as it moves slowly away from the Vehicle Assembly Building on its 4.24-mile journey to Pad B, Launch Complex 39, at NASA's Kennedy Space Center. The ASTP vehicle is composed of a Saturn 1B (first) stage, a Saturn IVB (second) stage, and a payload consisting of a Command/Service Module and a Docking Module. The joint U.S.-USSR ASTP docking mission in Earth orbit is scheduled for July 1975.

S71-33786 (11 May 1971) --- The 363-feet tall Apollo (Spacecraft 112/Lunar Module 10/Saturn 510) space vehicle which leaves the Vehicle Assembly Building (VAB) to Pad A, Launch Complex 39, Kennedy Space Center (KSC). The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. Apollo 15 is scheduled as the fourth manned lunar landing mission by the National Aeronautics and Space Administration (NASA) and is scheduled to lift off on July 26, 1971. The crew men will be astronauts David R. Scott, commander; Alfred M. Worden, command module pilot; and James B. Irwin, lunar module pilot. While astronaut Scott and Irwin will descend in the Lunar Module (LM) to explore the moon, astronaut Worden will remain with the Command and Service Modules (CSM) in lunar orbit.

S71-33781 (11 May 1971) --- High angle view showing the Apollo 15 (Spacecraft 112/Lunar Module 10/Saturn 510) space vehicle on the way from the Vehicle Assembly Building (VAB) to Pad A, Launch Complex 39, Kennedy Space Center (KSC). The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. Apollo 15 is scheduled as the fourth manned lunar landing mission by the National Aeronautics and Space Administration (NASA). The crew men will be astronauts David R. Scott, commander; Alfred M. Worden, command module pilot; and James B. Irwin, lunar module pilot. While astronauts Scott and Irwin descend in the Lunar Module (LM) to explore the moon, astronaut Worden will remain with the Command and Service Modules (CSM) in lunar orbit.

S70-54121 (9 Nov. 1970) --- A ground level view at Launch Complex 39, Kennedy Space Center (KSC), showing the Apollo 14 (Spacecraft 110/Lunar Module 8/Saturn 509) space vehicle leaving the Vehicle Assembly Building (VAB). The Saturn V stack and its mobile launch tower, atop a huge crawler-transporter, were rolled out to Pad A. The Apollo 14 crewmen will be astronauts Alan B. Shepard Jr., commander; Stuart A. Roosa, command module pilot; and Edgar D. Mitchell, lunar module pilot.

S70-54127 (9 Nov. 1970) --- A high-angle view at Launch Complex 39, Kennedy Space Center (KSC), showing the Apollo 14 (Spacecraft 110/Lunar Module 8/Saturn 509) space vehicle on the way from the Vehicle Assembly Building (VAB) to Pad A. The Saturn V stack and its mobile launch tower sit atop a huge crawler-transporter. The Apollo 14 crewmen will be astronauts Alan B. Shepard Jr., commander; Stuart A. Roosa, command module pilot; and Edgar D. Mitchell, lunar module pilot.

S69-27741 (11 March 1969) --- Aerial view at Launch Complex 39, Kennedy Space Center, showing the 363-feet tall Apollo 10 (Spacecraft 106/Lunar Module-4/Saturn 505) space vehicle on its way to Pad B. The Vehicle Assembly Building is in the background. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. The Apollo 10 flight is schedule as a lunar orbit mission. The Apollo 10 crew will be astronauts Thomas P. Stafford, commander; John W. Young, command module pilot; and Eugene A. Cernan, lunar module pilot.

S70-54119 (9 Nov. 1970) --- A high-angle view at Launch Complex 39, Kennedy Space Center (KSC), showing the Apollo 14 (Spacecraft 110/Lunar Module 8/Saturn 509) space vehicle on the way from the Vehicle Assembly Building (VAB) to Pad A. The Saturn V stack and its mobile launch tower sit atop a huge crawler-transporter. The Apollo 14 crewmen will be astronauts Alan B. Shepard Jr., commander; Stuart A. Roosa, command module pilot; and Edgar D. Mitchell, lunar module pilot.

S69-27916 (11 March 1969) --- Aerial view at Launch Complex 39, Kennedy Space Center, showing the Apollo 10 (Spacecraft 106/Lunar Module-4/Saturn 505) space vehicle on its way to Pad B. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. The Apollo 10 flight is scheduled as a lunar orbit mission. The Apollo 10 crew will be astronauts Thomas P. Stafford, commander; John W. Young, command module pilot; and Eugene A. Cernan, lunar module pilot.

S70-55689 (9 Nov. 1970) --- The Apollo 14 (Spacecraft 110/Lunar Module 8/Saturn 509) space vehicle arrives at Pad A, Launch Complex 39, during the Apollo 14 roll out from the Kennedy Space Center's Vehicle Assembly Building. The Saturn V stack and its mobile launch tower atop a huge crawler-transporter. The three members of the Apollo 14 prime crew are in the foreground. They are (left to right) astronauts Edgar D. Mitchell, lunar module pilot; Alan B. Shepard Jr., commander; and Stuart A. Roosa, command module pilot.

An Apollo/Saturn V facilities Test Vehicle and Launch Umbilical Tower (LUT) atop a crawler-transporter move from the Vehicle Assembly Building (VAB) on the way to Pad A. This test vehicle, designated the Apollo/Saturn 500-F, is being used to verify launch facilities, train launch crews, and develop test and checkout procedures.

S68-49399 (9 Oct. 1968) --- The Apollo 8 (Spacecraft 103/Saturn 503) space vehicle on the way from the Kennedy Space Center's (KSC) Vehicle Assembly Building (VAB) to Pad A, Launch Complex 39. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter.

This picture shows the Saturn V vehicle (AS-501), for the Apollo 4 mission on the Crawler Transporter Vehicle. It was rolled out from the Vehicle Assembly Building and slowly (1 mph) moved to the launch pad at the Kennedy Space Center (KSC). The Apollo 4 mission was the first launch of the Saturn V launch vehicle. Objectives of the unmanned Apollo 4 test flight were to obtain flight information on launch vehicle and spacecraft structural integrity and compatibility, flight loads, stage separation, and subsystems operation including testing of restart of the S-IVB stage, and to evaluate the Apollo command module heat shield. The Apollo 4 was launched on November 9, 1967 from KSC.

Apollo 6, the second and last of the unmarned Saturn V test flights, is slowly transported past the Vehicle Assembly Building on the way to launch pad 39-A. The towering 363-foot Saturn V was a multi-stage, multi-engine launch vehicle standing taller than the Statue of Liberty. Altogether, the Saturn V engines produced as much power as 85 Hoover Dams.

NASA used barges for transporting full-sized stages for the Saturn I, Saturn IB, and Saturn V vehicles between the Marshall Space Flight Center (MSFC), the manufacturing plant at the Michoud Assembly Facility (MAF), the Mississippi Test Facility for testing, and the Kennedy Space Center. The barges traveled from the MSFC dock to the MAF, a total of 1,086.7 miles up the Tennessee River and down the Mississippi River. The barges also transported the assembled stages of the Saturn vehicle from the MAF to the Kennedy Space Center, a total of 932.4 miles along the Gulf of Mexico and up along the Atlantic Ocean, for the final assembly and the launch. This photograph shows the barge Orion at the MSFC dock.

S67-43593 (26 Aug. 1967) --- The completely assembled Apollo Saturn 501 launch vehicle mated to the Apollo spacecraft 017 on Launch Complex 39A, Kennedy Space Center. The fully assembled vehicle was transported to the launch complex on the crawler.

S68-49397 (9 Oct. 1968) --- The Apollo 8 prime crew stands in foreground as the Apollo (Spacecraft 103/Saturn 503) space vehicle leaves the Kennedy Space Center's Vehicle Assembly Building on way to Pad A, Launch Complex 39. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. The Apollo 8 crew consists of (left to right) astronauts Frank Borman, commander; James A. Lovell Jr., command module pilot; and William A. Anders, lunar module pilot.

A bird's-eye view of Apollo 6 and its gantry leaving the Vehicle Assembly Building on the transporter heading to the launch site on Pad 39-A at Kennedy Space Center. The towering 363-foot Saturn V was a multi-stage, multi-engine launch vehicle standing taller than the Statue of Liberty. Altogether, the Saturn V engines produced as much power as 85 Hoover Dams.

S68-49404 (9 Oct. 1968) --- The Apollo 8 (Spacecraft 103/Saturn 503) space vehicle on way from Kennedy Space Center's Vehicle Assembly Building to Pad A, Launch Complex 39. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. (ground-level view, looking across water, with VAB on left)

S69-17485 (3 Jan. 1969) --- Aerial view of the Apollo 9 (Spacecraft 104/Lunar Module 3/Saturn 504) space vehicle on the way from the Vehicle Assembly Building to Pad A, Launch Complex 39, Kennedy Space Center. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. (view looking toward Pad A)

S69-17487 (3 Jan. 1969) --- Aerial view of the Apollo 9 (Spacecraft 104/Lunar Module 3/Saturn 504) space vehicle on the way from the Vehicle Assembly Building to Pad A, Launch Complex 39, Kennedy Space Center. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. (view looking toward Pad A)

S68-49405 (9 Oct. 1968) --- The Apollo 8 (Spacecraft 103/Saturn 503) space vehicle on way from Kennedy Space Center's (KSC) Vehicle Assembly Building (VAB) to Pad A, Launch Complex 39. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. (Ground level view, looking across water.)

S69-34319 (11 March 1969) --- The 363-feet tall Apollo 10 (Spacecraft 106/Lunar Module 4/Saturn 505) space vehicle on the way from the Vehicle Assembly Building to Pad B, Launch Complex 39, Kennedy Space Center. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter.

NASA used barges for transporting full-sized stages for the Saturn I, Saturn IB, and Saturn V vehicles between the Marshall Space Flight Center (MSFC), the manufacturing plant at the Michoud Assembly Facility (MAF), the Mississippi Test Facility for testing, and the Kennedy Space Center. The barges traveled from the MSFC dock to the MAF, a total of 1,086.7 miles up the Tennessee River and down the Mississippi River. The barges also transported the assembled stages of the Saturn vehicle from the MAF to the Kennedy Space Center, a total of 932.4 miles along the Gulf of Mexico and up along the Atlantic Ocean, for the final assembly and the launch. This photograph shows the barge Poseidon loaded with the Saturn V S-II (second) stage passing through a bascule bridge.

NASA used barges for transporting full-sized stages for the Saturn I, Saturn IB, and Saturn V vehicles between the Marshall Space Flight Center (MSFC), the manufacturing plant at the Michoud Assembly Facility (MAF), the Mississippi Test Facility for testing, and the Kennedy Space Center. The barges traveled from the MSFC dock to the MAF, a total of 1,086.7 miles up the Tennessee River and down the Mississippi River. The barges also transported the assembled stages of the Saturn vehicle from the MAF to the Kennedy Space Center, a total of 932.4 miles along the Gulf of Mexico and up along the Atlantic Ocean, for the final assembly and the launch. Pictured is the barge Palaemon carrying Saturn IV S-IB flight stage enroute to MSFC.

This photograph shows the Saturn V assembled LOX (Liquid Oxygen) and fuel tanks ready for transport from the Manufacturing Engineering Laboratory at Marshall Space Flight Center in Huntsville, Alabama. The tanks were then shipped to the launch site at Kennedy Space Center for a flight. The towering 363-foot Saturn V was a multi-stage, multi-engine launch vehicle standing taller than the Statue of Liberty. Altogether, the Saturn V engines produced as much power as 85 Hoover Dams.

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians assist as a crane lifts a portion of the treads on the C truck of crawler-transporter 2, or CT-2, away from the vehicle. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a portion of the treads on the C truck of crawler-transporter 2, or CT-2, have been removed from the vehicle. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

KENNEDY SPACE CENTER, FLA. - Carrying the Apollo 11 Saturn V space vehicle and mobile launcher, the transporter inches its way to the hardstand atop Launch Complex 39A. (Unfueled Saturn V weighs 1/2 million pounds,) Rollout began at 12:30 p.m. EDT today and was completed at 7:46 p.m. after positioning the 12.5-million-pound load on support pedestals. The transporter carried the vehicle along the 3.5-mile crawlerway at an average speed of less than 1 mile per hour. The 363-foot-high space vehicle is to launch Apollo 11 astronauts Neil A. Armstrong, Michael Collins and Edwin E. Aldrin Jr. on the Nation's first manned lunar landing mission.

S67-43595 (26 Aug. 1967) --- The Apollo 4 (Spacecraft 017/Saturn 501) stack and its mobile launch tower atop a crawler-transporter moving from the Vehicle Assembly Building toward Pad A, Launch Complex 39.

S69-51299 (8 Sept. 1969) --- Ground-level view at Launch Complex 39, Kennedy Space Center (KSC), showing the Apollo 12 (Spacecraft 108/ Lunar Module 6/ Saturn 507) space vehicle on the way from the Vehicle Assembly Building (VAB) to Pad A. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. The Launch Complex 39 service structure is on the right. Apollo 12 is scheduled as the second lunar landing mission. The crew will be astronauts Charles Conrad Jr., commander; Richard F. Gordon Jr., command module pilot; and Alan L. Bean, lunar module pilot.

The powerful J-2 engine is prominent in this photograph of a Saturn V Third Stage (S-IVB) resting on a transporter in the Manufacturing Facility at Marshall Space Flight Center in Huntsville, Alabama. The towering 363-foot Saturn V was a multi-stage, multi-engine launch vehicle standing taller than the Statue of Liberty. Altogether, the Saturn V engines produced as much power as 85 Hoover Dams.

The business end of a Second Stage (S-II) slowly emerges from the shipping container as workers prepare to transport the Saturn V component to the testing facility at MSFC. The Second Stage (S-II) underwent vibration and engine firing tests. The towering 363-foot Saturn V was a multi-stage, multi-engine launch vehicle standing taller than the Statue of Liberty. Altogether, the Saturn V engines produced as much power as 85 Hoover Dams.

S69-51308 (8 Sept. 1969) --- High-angle view at Launch Complex 39, Kennedy Space Center (KSC), showing the Apollo 12 (Spacecraft 108/ Lunar Module 6/ Saturn 507) space vehicle leaving the Vehicle Assembly Building (VAB) on the way to Pad A. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. Apollo 12 is scheduled as the second lunar landing mission. The crew will be astronauts Charles Conrad Jr., commander; Richard F. Gordon Jr., command module pilot; and Alan L. Bean, lunar module pilot.

S72-19795 (13 Dec. 1971) --- A large crowd of spectators look on as the 363-feet tall Apollo 16 (Spacecraft 113/Lunar Module 11/Saturn 511) space vehicle moves out of the Vehicle Assembly Building (VAB) at the Kennedy Space Center's (KSC) Launch Complex 39 toward Pad A. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. The prime crew men of the scheduled Apollo 16 lunar landing mission are astronauts John W. Young, commander; Thomas K. Mattingly, command module pilot; and Charles M. Duke Jr., lunar module pilot.

S69-51309 (8 Sept. 1969) --- High-angle view at Launch Complex 39, Kennedy Space Center (KSC), showing the Apollo 12 (Spacecraft 108/Lunar Module 6/Saturn 507) space vehicle on the way from the Vehicle Assembly Building (VAB) to Pad A. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. Apollo 12 is scheduled as the second lunar landing mission. The crew will be astronauts Charles Conrad Jr., commander; Richard F. Gordon Jr., command module pilot; and Alan L. Bean, lunar module pilot.

S72-48730 (28 Aug. 1972) --- A ground-level view of the huge Apollo 17 (Spacecraft 114/Lunar Module 12/Saturn 512) space vehicle leaving the Vehicle Assembly Building on its way to Pad A, Launch Complex 39, Kennedy Space Center. The Saturn V stack and its mobile launch tower are atop a mammoth crawler-transporter. The prime crew for the Apollo 17 lunar landing mission will be astronauts Eugene A. Cernan, commander; Ronald E. Evans, command module pilot; and scientist-astronaut Harrison H. Schmitt, lunar module pilot.

KENNEDY SPACE CENTER, FLA. - Rollout of Apollo 11 Saturn V space vehicle from the VAB's High Bay #1 to Launch Complex 39A. The transporter covered the 3.5-mile distance at an average speed of less than one mile per hour.

This photograph shows the Saturn-I first stage (S-1 stage) being transported to the test stand for a static test firing at the Marshall Space Flight Center. Soon after NASA began operations in October 1958, it was evident that sending people and substantial equipment beyond the Earth's gravitational field would require launch vehicles with weight-lifting capabilities far beyond any developed to that time. In early 1959, NASA accepted the proposal of Dr. Wernher von Braun for a multistage rocket, with a number of engines clustered in one or more of the stages to provide a large total thrust. The initiation of the Saturn launch vehicle program ultimately led to the study and preliminary plarning of many different configurations and resulted in production of three Saturn launch vehicles, the Saturn-I, Saturn I-B, and Saturn V. The Saturn family of launch vehicles began with the Saturn-I, a two-stage vehicle originally designated C-1. The research and development program was planned in two phases, or blocks: one for first stage development (Block I) and the second for both first and second stage development (Block-II). Saturn I had a low-earth-orbit payload capability of approximately 25,000 pounds. The design of the first stage (S-1 stage) used a cluster of propellant tanks containing liquid oxygen (LOX) and kerosene (RP-1), and eight H-1 engines, yielding a total thrust of 1,500,000 pounds. Of the ten Saturn-Is planned, the first eight were designed and built at the Marshall Space Flight Center, and the remaining two were built by the Chrysler Corporation.

Engineers and technicians at the Marshall Space Flight Center placed a Saturn V ground test booster (S-IC-D) into the dynamic test stand. The stand was constructed to test the integrity of the vehicle. Forces were applied to the tail of the vehicle to simulate the engines thrusting, and various other flight factors were fed to the vehicle to test reactions. The Saturn V launch vehicle, with the Apollo spacecraft, was subjected to more than 450 hours of shaking. The photograph shows the 300,000 pound S-IC stage being lifted from its transporter into place inside the 360-foot tall test stand. This dynamic test booster has one dummy F-1 engine and weight simulators are used at the other four engine positions.

CAPE CANAVERAL, Fla. - Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, work continues to remove the sprocket shaft assembly from the C truck of crawler-transporter 2, or CT-2. The sprocket assemblies will be placed into shipping cradles on pallets and positioned on a flatbed trailer. They will be sent to a vendor for inspections and refurbishment. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians attach crane lines to the treads on the C truck of crawler-transporter 2, or CT-2, so they can be lifted up and away. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a ground support technician assists with removal of a bearing from the B truck tread of crawler-transporter 2, or CT-2. New roller bearing assemblies will be installed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, preparations are underway to remove the gear boxes on the C truck of crawler-transporter 2, or CT-2. A section of the treads were removed to allow access to the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. - Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians attach a roller bearing shaft to a forklift. The bearing is being prepared for insertion in the C truck of crawler-transporter 2, or CT-2. A section of the treads on the C truck were removed to allow access to the bearings. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. - Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians install a new roller bearing shaft on the C truck of crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, an old bearing has been removed from the B truck tread of crawler-transporter 2, or CT-2, and loaded onto a forklift for disposal. New roller bearing assemblies will be installed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a ground support technician assists as a crane lifts up a section of the treads on the C truck of crawler-transporter 2, or CT-2. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians apply heat to a casing that contains an old bearing on the B truck tread of crawler-transporter 2, or CT-2. The bearing will separate and out for removal. New roller bearing assemblies will be installed on CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, an old bearing has been removed from the B truck tread of crawler-transporter 2, or CT-2, and loaded onto a forklift for disposal. New roller bearing assemblies will be installed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the B and D truck sections of crawler-transporter 2, or CT-2, are being raised up to prepare for installation of new roller bearing assemblies. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a ground support technician applies heat to a casing that contains an old bearing on the B truck tread of crawler-transporter 2, or CT-2. The bearing will separate and out for removal. New roller bearing assemblies will be installed on CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. - Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians use a special work stand to guide a roller bearing shaft for insertion on the C truck of crawler-transporter 2, or CT-2. A section of the treads on the C truck were removed to allow access to the bearings. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians assist with removal of a bearing from the B truck tread of crawler-transporter 2, or CT-2, and prepare to load it on a forklift for disposal. New roller bearing assemblies will be installed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a ground support technician assists with removal of bearings from the B truck tread of crawler-transporter 2, or CT-2. New roller bearing assemblies will be installed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the B and D truck sections of crawler-transporter 2, or CT-2, are being raised up to prepare for installation of new roller bearing assemblies. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http:__www.nasa.gov_exploration_systems_ground_crawler-transporter. Photo credit: NASA_Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the B and D truck sections of crawler-transporter 2, or CT-2, are being raised up to prepare for installation of new roller bearing assemblies. Sections of the crawler’s large metal tracks have been removed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the B and D truck sections of crawler-transporter 2, or CT-2, are being raised up to prepare for installation of new roller bearing assemblies. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians assist with removal of bearings from the B truck tread of crawler-transporter 2, or CT-2. New roller bearing assemblies will be installed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. - Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians use a special work stand to guide a roller bearing shaft for insertion on the C truck of crawler-transporter 2, or CT-2. A section of the treads on the C truck were removed to allow access to the bearings. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, preparations are underway to remove the gear boxes on the C truck of crawler-transporter 2, or CT-2. A section of the treads were removed to allow access to the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. -- Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians prepare for removal of one of the sprocket shaft assemblies on the C truck of crawler-transporter 2, or CT-2. A section of the treads on the C truck were removed to allow access to the sprocket assemblies. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. - Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a new roller bearing shaft is being inserted in the C truck of crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians install new roller bearings on the C truck of crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. - Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians prepare for removal of the outboard and inboard sprocket shaft assemblies on the C truck of crawler-transporter 2, or CT-2. A section of the treads on the C truck were removed to allow access to the sprocket assemblies. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a technician monitors the progress as the B and D truck sections of crawler-transporter 2, or CT-2, are raised up to prepare for installation of new roller bearing assemblies. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http:__www.nasa.gov_exploration_systems_ground_crawler-transporter. Photo credit: NASA_Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians attach crane lines to the treads on the C truck of crawler-transporter 2, or CT-2, so they can be lifted up and away. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. - Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians attach a roller bearing shaft to a forklift. The bearing is being prepared for insertion in the C truck of crawler-transporter 2, or CT-2. A section of the treads on the C truck were removed to allow access to the bearings. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians install new roller bearings on the C truck of crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians attach crane lines to the treads on the C truck of crawler-transporter 2, or CT-2, so they can be lifted up and away. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a technician monitors the progress as the B and D truck sections of crawler-transporter 2, or CT-2, are raised up to prepare for installation of new roller bearing assemblies. Sections of the crawler’s large metal tracks have been removed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a ground support technician installs a new roller bearing on the C truck of crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the B and D truck sections of crawler-transporter 2, or CT-2, have been raised up to prepare for installation of new roller bearing assemblies. Sections of the crawler’s large metal tracks have been removed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – A section of the treads on the C truck of crawler-transporter 2, or CT-2, have been removed and are being stored near the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida. The treads are being removed from the crawler in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE KENNEDY, Fla. -- At the Kennedy Space Center in Florida, Dr. Kurt H. Debus, center director, speaks at the "topping off" ceremonies for the Vehicle Assembly Building. A crawler-transporter is seen at the right. One of the largest buildings in the world, the 129 million cubic foot structure will be used to prepare the Apollo Saturn V launch vehicles for missions to land astronauts on the moon. Photo Credit: NASA

CAPE CANAVERAL, Fla. -- A technician completes the installation of a new bearing on crawler-transporter 2 in Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians have removed an old roller shaft bearing from crawler-transporter 2, or CT-2. New roller shaft bearings will be installed on CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians have removed an old roller shaft bearing from crawler-transporter 2, or CT-2. New roller shaft bearings will be installed on CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- Technicians install a new bearing on crawler-transporter 2 in Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians prepare to install new roller shaft bearings in crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – Near the Vehicle Assembly Building, or VAB, at NASA’s Kennedy Space Center in Florida, an older roller shaft bearing that was removed from crawler-transporter 2, or CT-2, is being discarded. Inside the VAB, new roller shaft bearings will be installed on CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- A technician installs a new bearing on crawler-transporter 2 in Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians prepare a new roller shaft bearing for installation in crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a technician monitors the progress as a new roller shaft bearing is being preparing for installation in crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- Technicians install a new bearing on crawler-transporter 2 in the Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, preparations are underway to install new roller shaft bearings in crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a technician uses a forklift to carry an old roller shaft bearing that was removed from crawler-transporter 2, or CT-2. New roller shaft bearings will be installed on CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – Near the Vehicle Assembly Building, or VAB, at NASA’s Kennedy Space Center in Florida, an old roller shaft bearing that was removed from crawler-transporter 2, or CT-2, is being discarded. Inside the VAB, new roller shaft bearings will be installed on CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians position equipment and forklifts as work continues to install new roller shaft bearings in crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians prepare to install a new roller shaft bearing in crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- Steady progress is made on the installation of new bearings on crawler-transporter 2 in Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- A technician completes the installation of a new bearing on crawler-transporter 2 in Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Technicians install a new bearing on crawler-transporter 2 in Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Technicians complete the installation of a new bearing on crawler-transporter 2 in Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Near the Vehicle Assembly Building, or VAB, at NASA’s Kennedy Space Center in Florida, old roller shaft bearing assembly parts that were removed from crawler-transporter 2, or CT-2, have been discarded. Inside the VAB, new roller shaft bearings will be installed on CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- The installation of new bearings on crawler-transporter 2 is underway in Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a technician prepares to install a new roller shaft bearing in crawler-transporter 2, or CT-2. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a technician performs welding in the bearing assembly area of crawler-transporter 2, or CT-2. New roller shaft bearings assemblies are being installed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- Preparations are underway to install new bearings on crawler-transporter 2 in the Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- A technician installs a new bearing on crawler-transporter 2 in Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The installation of new bearings on crawler-transporter 2 is underway in Vehicle Assembly Building High Bay 2 at NASA's Kennedy Space Center in Florida. Modifications underway on the crawler are designed to ensure its ability to transport launch vehicles currently under development, such as the agency’s Space Launch System, to the launch pad. Present modifications represent a redesign and upgrade to the roller bearings and assemblies originally installed on the crawler. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform carrying the Apollo-Saturn V rockets and space shuttles to Launch Pads 39A and 39B. For more information, visit http://www.nasa.gov/exploration/systems/ground/crawler-transporter_bearings_prt.htm. Photo credit: NASA/Kim Shiflett