NASA's upgraded crawler-transporter 2 (CT-2) picks up mobile launcher platform 1 (MLP1) at the MLP park site near the Vehicle Assembly at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

The two mobile launcher platforms (MLPs) are seen at the MSS park site at NASA’s Kennedy Space Center in Florida on Jan. 4, 2021. One MLP is undergoing crawlerway conditioning – a several month-long project to ensure the path the rocket takes from the VAB to the launch pad is strong enough to support the weight for the upcoming Artemis I launch. The other MLP used during the shuttle program is in the process of being demolished.

The two mobile launcher platforms (MLPs) are seen at the MSS park site at NASA’s Kennedy Space Center in Florida on Jan. 4, 2021. One MLP is undergoing crawlerway conditioning – a several month-long project to ensure the path the rocket takes from the VAB to the launch pad is strong enough to support the weight for the upcoming Artemis I launch. The other MLP used during the shuttle program is in the process of being demolished.

The two mobile launcher platforms (MLPs) are seen at the MSS park site at NASA’s Kennedy Space Center in Florida on Jan. 4, 2021. One MLP is undergoing crawlerway conditioning – a several month-long project to ensure the path the rocket takes from the VAB to the launch pad is strong enough to support the weight for the upcoming Artemis I launch. The other MLP used during the shuttle program is in the process of being demolished.

Ground support technicians walk alongside NASA's upgraded crawler-transporter 2 (CT-2), carrying mobile launcher platform 1, as it slowly travels on the crawlerway at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA’s upgraded crawler-transporter 2 (CT-2) travels slowly along the crawlerway carrying mobile launcher platform 1 at the agency’s Kennedy Space Center in Florida. The crawler's upgrades and modifications were being monitored and tested under loaded conditions during its travel to the Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. A truck sprays water in front of the crawler to control dust as the large vehicle moves along. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA's upgraded crawler-transporter 2 (CT-2) travels slowly along the crawlerway, carrying the mobile launcher platform at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

During a load test of NASA's upgraded crawler-transporter 2 (CT-2), a ground support technician watches as the giant vehicle travels along the crawlerway at the agency’s Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA's upgraded crawler-transporter 2 (CT-2), carrying mobile launcher platform 1, moves slowly along the crawlerway at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA's upgraded crawler-transporter 2 (CT-2), carrying mobile launcher platform 1, moves slowly along the crawlerway toward the Vehicle Assembly Building at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications were monitored and tested during a loaded test to the crawlerway Pad A/B split. CT-2 will return to the crawler yard. The crawler is being tested to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA's upgraded crawler-transporter 2 (CT-2), carrying mobile launcher platform 1, moves slowly along the crawlerway toward the Vehicle Assembly Building at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications were monitored and tested during a loaded test to the crawlerway Pad A/B split. CT-2 will return to the crawler yard. The crawler is being tested to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA's upgraded crawler-transporter 2 (CT-2), carrying mobile launcher platform 1, moves slowly along the crawlerway at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

KENNEDY SPACE CENTER, FLA. - Crawler-transporter (CT) number 2, moves away from the Vehicle Assembly Building with a Mobile Launcher Platform (MLP) on top on a test run to the launch pad. The CT recently underwent modifications to the cab. The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - A closeup of crawler-transporter (CT) number 2 shows the cab, at left, that recently underwent modifications. The CT is transporting a Mobile Launch Platform (MLP) on a test run to the pad. The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - A closeup of crawler-transporter (CT) number 2 shows the cab (left, above the tracks) that recently underwent modifications. The CT is transporting a Mobile Launch Platform (MLP) on a test run to the pad. The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - A closeup of crawler-transportation (CT) number 2 shows the new muffler system on the vehicle. The CT also recently underwent modifications to the cab. The CT is transporting a Mobile Launch Platform (MLP). The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - Inside the cab of crawler-transporter (CT) number 2, driver Sam Dove, with United Space Alliance, operates the vehicle on a test run to the launch pad. The CT recently underwent modifications to the cab. The CT is transporting a Mobile Launch Platform (MLP). The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - Inside the cab of crawler-transporter (CT) number 2, driver Sam Dove, with United Space Alliance, operates the vehicle on a test run to the launch pad. The CT recently underwent modifications to the cab. The CT is transporting a Mobile Launch Platform (MLP). The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - Crawler-transporter (CT) number 2 nears the launch pad with a Mobile Launcher Platform (MLP) on top. After recent modifications to the cab and muffler system, the CT was taken on a test run. The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

During a practice run, crawler-transporter 2 (CT-2) is at the entrance to High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. CT-2 entered High Bay 2, and picked up the space shuttle-era mobile launch platform-3 (MLP-3). The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2) is at the entrance to High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. CT-2 entered High Bay 2, and picked up the space shuttle-era mobile launch platform-3 (MLP-3). The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2) is at the entrance to High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. CT-2 entered High Bay 2, and picked up the space shuttle-era mobile launch platform-3 (MLP-3). The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2) is moving inside High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. CT-2 picked up the space shuttle-era mobile launch platform-3 (MLP-3). The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2) is being driven to the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. CT-2 entered High Bay 2, and picked up the space shuttle-era mobile launch platform-3 (MLP-3). The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2) is moving inside High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. In view at right is one of the cabs used to drive the crawler. CT-2 picked up the space shuttle-era mobile launch platform-3 (MLP-3). The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2) is being driven to the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. CT-2 entered High Bay 2, and picked up the space shuttle-era mobile launch platform-3 (MLP-3). The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2) picked up the space shuttle-era mobile launch platform-3 (MLP-3) inside High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2), with the space shuttle-era mobile launch platform-3 (MLP-3) on top, moves out of High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. A truck in front sprays water to reduce dust on the crawlerway. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2), with the space shuttle-era mobile launch platform-3 (MLP-3) on top, begins its move out of High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2), with the space shuttle-era mobile launch platform-3 (MLP-3) on top, has exited High Bay 2 of the Vehicle Assembly Building (VAB) and moves slowly along the crawlerway at NASA’s Kennedy Space Center in Florida on May 1, 2019. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2), with the space shuttle-era mobile launch platform-3 (MLP-3) on top, moves out of High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2), with the space shuttle-era mobile launch platform-3 (MLP-3) on top, has exited High Bay 2 of the Vehicle Assembly Building (VAB) and moves slowly along the crawlerway at NASA’s Kennedy Space Center in Florida on May 1, 2019. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2), with the space shuttle-era mobile launch platform-3 (MLP-3) on top, has exited High Bay 2 of the Vehicle Assembly Building (VAB) and moves slowly along the crawlerway at NASA’s Kennedy Space Center in Florida on May 1, 2019. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2), with the space shuttle-era mobile launch platform-3 (MLP-3) on top, has exited High Bay 2 of the Vehicle Assembly Building (VAB) and moves slowly along the crawlerway at NASA’s Kennedy Space Center in Florida on May 1, 2019. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

During a practice run, crawler-transporter 2 (CT-2), with the space shuttle-era mobile launch platform-3 (MLP-3) on top, moves out of High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on May 1, 2019. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

KENNEDY SPACE CENTER, FLA. - Space Shuttle Discovery, atop a Mobile Launcher Platform (MLP), crawls toward Launch Complex 39B. First motion out of the Vehicle Assembly Building occurred at 2:04 p.m. EDT. The rollout marks a major milestone in the Space Shuttle Program’s Return to Flight. The MLP is moved by a Crawler-Transporter underneath. A banner signed by KSC employees who helped process the orbiter for launch, proclaiming 'We're Behind You, Discovery_,' is affixed to the MLP. Launch of Discovery on its Return to Flight mission, STS-114, is targeted for May 15 with a launch window that extends to June 3. During its 12-day mission, Discovery’s seven-person crew will test new hardware and techniques to improve Shuttle safety, as well as deliver supplies to the International Space Station.

CAPE CANAVERAL, Fla. -- A crawler-transporter begins its climb toward Mobile Launcher Platform-2, or MLP-2, on the hardstand at Launch Pad 39A at NASA's Kennedy Space Center in Florida. Operations are underway to move the MLP to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- A crawler-transporter nears the Mobile Launcher Platform-2, or MLP-2, positioned over the flame trench at Launch Pad 39A at NASA's Kennedy Space Center in Florida. Operations are underway to move the MLP to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- A crawler-transporter creeps toward Mobile Launcher Platform-2, or MLP-2, on the hardstand at Launch Pad 39A at NASA's Kennedy Space Center in Florida. Operations are underway to move the MLP to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- A crawler-transporter carries Mobile Launcher Platform-2, or MLP-2, away from Launch Pad 39A at NASA's Kennedy Space Center in Florida. The MLP is being moved to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -Crawler-transporter (CT) number 2, moves away from the Vehicle Assembly Building, with a Mobile Launcher Platform on top, on a test run to the launch pad. The CT recently underwent modifications to the cab. The CT moves Space Shuttle vehicles between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds.

KENNEDY SPACE CENTER, Fla. -- As the early morning sky lights up, Space Shuttle Endeavour inches its way to Launch Pad 39B (on the horizon) via the crawlerway that leads from the Vehicle Assembly Building. The Shuttle is atop the Mobile Launcher Platform (MLP). Visible beneath the MLP is the crawler-transporter, which moves on four double-tracked crawlers. Each shoe on the crawler track weighs a ton. Unloaded, the transporter weighs 6 million pounds and moves at 2 mph. The maximum speed of the loaded transporter is 1 mph. Endeavour is scheduled to be launched Nov. 30 at 10:01 p.m. EST on mission STS-97, the sixth construction flight to the International Space Station. Its payload includes the P6 Integrated Truss Structure and a photovoltaic (PV) module, with giant solar arrays that will provide power to the Station. The mission includes two spacewalks to complete the solar array connections

KENNEDY SPACE CENTER, Fla. -- As the early morning sky lights up, Space Shuttle Endeavour inches its way to Launch Pad 39B (on the horizon) via the crawlerway that leads from the Vehicle Assembly Building. The Shuttle is atop the Mobile Launcher Platform (MLP). Visible beneath the MLP is the crawler-transporter, which moves on four double-tracked crawlers. Each shoe on the crawler track weighs a ton. Unloaded, the transporter weighs 6 million pounds and moves at 2 mph. The maximum speed of the loaded transporter is 1 mph. Endeavour is scheduled to be launched Nov. 30 at 10:01 p.m. EST on mission STS-97, the sixth construction flight to the International Space Station. Its payload includes the P6 Integrated Truss Structure and a photovoltaic (PV) module, with giant solar arrays that will provide power to the Station. The mission includes two spacewalks to complete the solar array connections

KENNEDY SPACE CENTER, FLA. -- KSC employees accompany the orbiter Atlantis as it is moved aboard an orbiter transporter to the Vehicle Assembly Building (VAB). In the background are OPF bays 1 and 2. In the VAB it will be lifted to vertical and placed aboard the mobile launcher platform (MLP) for stacking with the solid rocket boosters and external tank. Atlantis is scheduled to launch Sept. 8 on mission STS-106, the fourth construction flight to the International Space Station, with a crew of seven

KENNEDY SPACE CENTER, FLA. -- KSC employees accompany the orbiter Atlantis as it is moved aboard an orbiter transporter to the Vehicle Assembly Building (VAB). In the background are OPF bays 1 and 2. In the VAB it will be lifted to vertical and placed aboard the mobile launcher platform (MLP) for stacking with the solid rocket boosters and external tank. Atlantis is scheduled to launch Sept. 8 on mission STS-106, the fourth construction flight to the International Space Station, with a crew of seven

KENNEDY SPACE CENTER, FLA. -- The orbiter Atlantis is moved aboard an orbiter transporter from the Orbiter Processing Facility (OPF) bay 3 over to the Vehicle Assembly Building (VAB). In the background (right) are OPF bays 1 and 2. In the VAB it will be lifted to vertical and placed aboard the mobile launcher platform (MLP) for stacking with the solid rocket boosters and external tank. Atlantis is scheduled to launch Sept. 8 on mission STS-106, the fourth construction flight to the International Space Station, with a crew of seven

KENNEDY SPACE CENTER, FLA. -- The orbiter Atlantis is moved aboard an orbiter transporter from the Orbiter Processing Facility (OPF) bay 3 over to the Vehicle Assembly Building (VAB). In the background (right) are OPF bays 1 and 2. In the VAB it will be lifted to vertical and placed aboard the mobile launcher platform (MLP) for stacking with the solid rocket boosters and external tank. Atlantis is scheduled to launch Sept. 8 on mission STS-106, the fourth construction flight to the International Space Station, with a crew of seven

Legislators, invited guests and members of the media attend a ribbon cutting ceremony on Aug. 16, 2019, in High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

Legislators, invited guests and members of the media attend a ribbon cutting ceremony on Aug. 16, 2019, in High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, Mobile Launcher Platform-2, or MLP-2, rolling away from Launch Pad 39A atop a crawler-transporter, was positioned over the pad's flame trench only moments before. The MLP is being moved to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, Mobile Launcher Platform-2, or MLP-2, is glimpsed across the water as it departs Launch Pad 39A atop a crawler-transporter. A pad on Cape Canaveral Air Force Station is in view in the background. The MLP is being moved to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The flame trench comes into view on Launch Pad 39A as a crawler-transporter hauls Mobile Launcher Platform-2, or MLP-2, off the pad at NASA's Kennedy Space Center in Florida. The MLP is being moved to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The crawler-transporter transporting Mobile Launcher Platform-2, or MLP-2, from Launch Pad 39A creeps along the crawlerway toward the Vehicle Assembly Building, or VAB, at NASA's Kennedy Space Center in Florida. The MLP is being moved to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- A crawler-transporter rolls under the Mobile Launcher Platform-2, or MLP-2, positioned over the flame trench at Launch Pad 39A at NASA's Kennedy Space Center in Florida. Operations are underway to move the MLP to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Sitting on top of the mobile launcher platform, space shuttle Discovery straddles the flame trench, which channels the flames and smoke exhaust of the shuttle's solid rocket boosters away from the space shuttle during liftoff, on Launch Pad 39A at NASA's Kennedy Space Center in Florida. Traveling from the Vehicle Assembly Building, the shuttle took nearly 12 hours on the journey as technicians stopped several times to clear mud from the crawler's treads and bearings caused by the waterlogged crawlerway. First motion out of the VAB was at 2:07 a.m. EDT Aug. 4. Rollout was delayed approximately 2 hours due to lightning in the area. Discovery was secured, or "hard down" to Launch Pad 39A at 1:50 p.m. EDT. "Hard down" means that the mobile launcher platform, or MLP, is sitting on the pedestals on the pad, and the crawler has been jacked down, thus transferring the weight of the MLP from the crawler to the pad pedestals. Discovery's 13-day flight will deliver a new crew member and 33,000 pounds of equipment to the International Space Station. The equipment includes science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Launch of Discovery on its STS-128 mission is targeted for late August. Photo credit: NASA/Troy Cryder

KENNEDY SPACE CENTER, FLA. - At NASA’s Kennedy Space Center, Space Shuttle Discovery is viewed from the side as it sits atop the Mobile Launcher Platform (MLP) rolling out to Launch Complex 39B. First motion out of the Vehicle Assembly Building occurred at 2:04 p.m. EDT. The rollout marks a major milestone in the Space Shuttle Program’s Return to Flight. The MLP is moved by the Crawler-Transporter underneath, which stands 20 feet high, 131 feet long and 114 feet wide. It moves on eight tracks, each containing 57 shoes, or cleats, weighing one ton each. Loaded with the Space Shuttle, the Crawler can move at a maximum speed of approximately 1 mile an hour. A leveling system in the Crawler keeps the Shuttle vertical while negotiating the 5 percent grade leading to the top of the launch pad. Launch of Discovery on its Return to Flight mission, STS-114, is targeted for May 15 with a launch window that extends to June 3. During its 12-day mission, Discovery’s seven-person crew will test new hardware and techniques to improve Shuttle safety, as well as deliver supplies to the International Space Station.

KENNEDY SPACE CENTER, Fla. -- After rollback of the Rotating Service Structure, Space Shuttle Atlantis can be seen atop the mobile launcher platform (MLP) on Launch Pad 39A. Below the MLP is the flame trench, part of the flame deflector system that insulates pad structures from the intense heat of launch. Made of concrete and refractory brick, the trench is 490 feet long, 48 feet wide and 40 feet high. At the top of the orange external tank can be seen the Gaseous Oxygen Vent Hood, often called the "beanie cap." The hood helps vent gaseous oxygen vapors away from the Space Shuttle. The hood will be raised and retracted two and a half minutes before launch. Abutting the side of Atlantis is the orbiter access arm with the environmental chamber known as the White Room at the end. The White Room provides access to the crew compartment. This will be the third assembly flight to the International Space Station. Liftoff of Space Shuttle Atlantis for the 10-day STS-101 mission is scheduled for about 6:12 a.m. EDT from Launch Pad 39A. Landing is targeted for May 29 at 2:19 a.m. EDT. This is the 98th Shuttle flight and the 21st flight for Shuttle Atlantis

KENNEDY SPACE CENTER, Fla. - The Rotating Service Structure has rolled back to launch position for the second time in two days after a scrub of mission STS-109 the day before. NASA managers had determined the unseasonably cold weather predicted at launch time was at the margin of acceptable limits. This view shows Space Shuttle Columbia atop the Mobile Launcher Platform (MLP) on Launch Pad 39A. Twin solid rocket boosters flank the orange-colored external tank. Above the tank is the 'beanie cap,' the gaseous oxygen vent hood. Below the MLP is the flame trench that helps deflect the intense heat and flames away from the vehicle as it lifts off. Columbia is rescheduled for launch on mission STS-109 March 1 at 6:22 a.m. EST (11:22 GMT). The 11-day mission will provide maintenance and upgrade to the Hubble Space Telescope, replacing Solar Array 2 with Solar Array 3, replacing the Power Control Unit, installing the ACS (after removing the Faint Object Camera ), the Near Infrared Camera, the Multi-Object Spectrometer (NICMOS) Cooling System, and the New Outer Blanket Layer insulation.

KENNEDY SPACE CENTER, FLA. - Blue sky blends with the blue Atlantic Ocean as Space Shuttle Discovery, atop the Mobile Launcher Platform (MLP), crawls toward Launch Complex 39B. First motion out of the Vehicle Assembly Building occurred at 2:04 p.m. EDT. The rollout marks a major milestone in the Space Shuttle Program’s Return to Flight. The MLP is moved by the Crawler-Transporter underneath, which stands 20 feet high, 131 feet long and 114 feet wide. It moves on eight tracks, each containing 57 shoes, or cleats, weighing one ton each. Loaded with the Space Shuttle, the Crawler can move at a maximum speed of approximately 1 mile an hour. A leveling system in the Crawler keeps the Shuttle vertical while negotiating the 5 percent grade leading to the top of the launch pad. Launch of Discovery on its Return to Flight mission, STS-114, is targeted for May 15 with a launch window that extends to June 3. During its 12-day mission, Discovery’s seven-person crew will test new hardware and techniques to improve Shuttle safety, as well as deliver supplies to the International Space Station.

KENNEDY SPACE CENTER, Fla. -- The last mission of the Shuttle-Mir program begins as the Space Shuttle Discovery lifts off from Launch Pad 39A at 6:06:24 p.m. EDT June 2. A torrent of water is seen flowing onto the mobile launcher platform (MLP) from numerous large quench nozzles, or "rainbirds," mounted on its surface. This water, part of the Sound Suppression System, helps protect the orbiter and its payloads from damage by acoustical energy and rocket exhaust reflected from the flame trench and MLP during launch. On board Discovery are Mission Commander Charles J. Precourt; Pilot Dominic L. Gorie; and Mission Specialists Wendy B. Lawrence, Franklin R. Chang-Diaz, Janet Lynn Kavandi and Valery Victorovitch Ryumin. The nearly 10-day mission will feature the ninth and final Shuttle docking with the Russian space station Mir, the first Mir docking for the Space Shuttle orbiter Discovery, the first on-orbit test of the Alpha Magnetic Spectrometer (AMS), and the first flight of the new Space Shuttle super lightweight external tank. Astronaut Andrew S. W. Thomas will be returning to Earth as an STS-91 crew member after living more than four months aboard Mir

KENNEDY SPACE CENTER, FLA. - At NASA’s Kennedy Space Center, Space Shuttle Discovery, atop the Mobile Launcher Platform (MLP), crawls toward Launch Complex 39B. Barely visible on the horizon at right is Pad 39A. First motion out of the Vehicle Assembly Building occurred at 2:04 p.m. EDT. The rollout marks a major milestone in the Space Shuttle Program’s Return to Flight. The MLP is moved by the Crawler-Transporter underneath, which stands 20 feet high, 131 feet long and 114 feet wide. It moves on eight tracks, each containing 57 shoes, or cleats, weighing one ton each. Loaded with the Space Shuttle, the Crawler can move at a maximum speed of approximately 1 mile an hour. A leveling system in the Crawler keeps the Shuttle vertical while negotiating the 5 percent grade leading to the top of the launch pad. Launch of Discovery on its Return to Flight mission, STS-114, is targeted for May 15 with a launch window that extends to June 3. During its 12-day mission, Discovery’s seven-person crew will test new hardware and techniques to improve Shuttle safety, as well as deliver supplies to the International Space Station.

KENNEDY SPACE CENTER, FLA. - Blue sky blends with the blue Atlantic Ocean as Space Shuttle Discovery, atop the Mobile Launcher Platform (MLP), crawls toward Launch Complex 39A, on its way to Pad 39B. First motion out of the Vehicle Assembly Building occurred at 2:04 p.m. EDT. The rollout marks a major milestone in the Space Shuttle Program’s Return to Flight. The MLP is moved by the Crawler-Transporter underneath, which stands 20 feet high, 131 feet long and 114 feet wide. It moves on eight tracks, each containing 57 shoes, or cleats, weighing one ton each. Loaded with the Space Shuttle, the Crawler can move at a maximum speed of approximately 1 mile an hour. A leveling system in the Crawler keeps the Shuttle vertical while negotiating the 5 percent grade leading to the top of the launch pad. Launch of Discovery on its Return to Flight mission, STS-114, is targeted for May 15 with a launch window that extends to June 3. During its 12-day mission, Discovery’s seven-person crew will test new hardware and techniques to improve Shuttle safety, as well as deliver supplies to the International Space Station.

KENNEDY SPACE CENTER, FLA. - Space Shuttle Discovery, atop a Mobile Launcher Platform (MLP), crawls toward Launch Complex 39B. First motion out of the Vehicle Assembly Building occurred at 2:04 p.m. EDT. The rollout marks a major milestone in the Space Shuttle Program’s Return to Flight. The MLP is moved by the Crawler-Transporter underneath, which stands 20 feet high, 131 feet long and 114 feet wide. It moves on eight tracks, each containing 57 shoes, or cleats, weighing one ton each. Loaded with the Space Shuttle, the Crawler can move at a maximum speed of approximately 1 mile an hour. A leveling system in the Crawler keeps the Shuttle vertical while negotiating the 5 percent grade leading to the top of the launch pad. Launch of Discovery on its Return to Flight mission, STS-114, is targeted for May 15 with a launch window that extends to June 3. During its 12-day mission, Discovery’s seven-person crew will test new hardware and techniques to improve Shuttle safety, as well as deliver supplies to the International Space Station.

KENNEDY SPACE CENTER, FLA. - At NASA’s Kennedy Space Center, Space Shuttle Discovery, atop the Mobile Launcher Platform (MLP), casts a shadow on the crawlerway as it makes its way east to Launch Complex 39B close to sunset. In the background is the Vehicle Assembly Building (VAB) where Discovery began the rollout at 2:04 p.m. EDT. The rollout marks a major milestone in the Space Shuttle Program’s Return to Flight. The MLP is moved by the Crawler-Transporter underneath, which stands 20 feet high, 131 feet long and 114 feet wide. It moves on eight tracks, each containing 57 shoes, or cleats, weighing one ton each. Loaded with the Space Shuttle, the Crawler can move at a maximum speed of approximately 1 mile an hour. A leveling system in the Crawler keeps the Shuttle vertical while negotiating the 5 percent grade leading to the top of the launch pad. Launch of Discovery on its Return to Flight mission, STS-114, is targeted for May 15 with a launch window that extends to June 3. During its 12-day mission, Discovery’s seven-person crew will test new hardware and techniques to improve Shuttle safety, as well as deliver supplies to the International Space Station.

KENNEDY SPACE CENTER, FLA. - At NASA’s Kennedy Space Center, Space Shuttle Discovery, atop the Mobile Launcher Platform (MLP), crawls toward Launch Complex 39B. First motion out of the Vehicle Assembly Building occurred at 2:04 p.m. EDT. The rollout marks a major milestone in the Space Shuttle Program’s Return to Flight. The MLP is moved by the Crawler-Transporter underneath, which stands 20 feet high, 131 feet long and 114 feet wide. It moves on eight tracks, each containing 57 shoes, or cleats, weighing one ton each. Loaded with the Space Shuttle, the Crawler can move at a maximum speed of approximately 1 mile an hour. A leveling system in the Crawler keeps the Shuttle vertical while negotiating the 5 percent grade leading to the top of the launch pad. Launch of Discovery on its Return to Flight mission, STS-114, is targeted for May 15 with a launch window that extends to June 3. During its 12-day mission, Discovery’s seven-person crew will test new hardware and techniques to improve Shuttle safety, as well as deliver supplies to the International Space Station.

KENNEDY SPACE CENTER, Fla. -- After rollback of the Rotating Service Structure, Space Shuttle Atlantis can be seen atop the mobile launcher platform (MLP) on Launch Pad 39A. Below the MLP is the flame trench, part of the flame deflector system that insulates pad structures from the intense heat of launch. Made of concrete and refractory brick, the trench is 490 feet long, 48 feet wide and 40 feet high. At the top of the orange external tank can be seen the Gaseous Oxygen Vent Hood, often called the "beanie cap." The hood helps vent gaseous oxygen vapors away from the Space Shuttle. The hood will be raised and retracted two and a half minutes before launch. Abutting the side of Atlantis is the orbiter access arm with the environmental chamber known as the White Room at the end. The White Room provides access to the crew compartment. This will be the third assembly flight to the International Space Station. Liftoff of Space Shuttle Atlantis for the 10-day STS-101 mission is scheduled for about 6:12 a.m. EDT from Launch Pad 39A. Landing is targeted for May 29 at 2:19 a.m. EDT. This is the 98th Shuttle flight and the 21st flight for Shuttle Atlantis

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery, atop a Mobile Launcher Platform (MLP), crawls toward Launch Complex 39B. First motion out of the Vehicle Assembly Building occurred at 2:04 p.m. EDT. The rollout marks a major milestone in the Space Shuttle Program’s Return to Flight. The MLP is moved by the Crawler-Transporter underneath, which stands 20 feet high, 131 feet long and 114 feet wide. It moves on eight tracks, each containing 57 shoes, or cleats, weighing one ton each. Loaded with the Space Shuttle, the Crawler can move at a maximum speed of approximately 1 mile an hour. A leveling system in the Crawler keeps the Shuttle vertical while negotiating the 5 percent grade leading to the top of the launch pad. Launch of Discovery on its Return to Flight mission, STS-114, is targeted for May 15 with a launch window that extends to June 3. During its 12-day mission, Discovery’s seven-person crew will test new hardware and techniques to improve Shuttle safety, as well as deliver supplies to the International Space Station.

During a ribbon cutting ceremony on Aug. 16, 2019, in High Bay 2 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida, Tom Engler, director of Kennedy’s Center Planning and Development Office, welcomes legislators and guests. The VAB is getting its first commercial tenant. Northrop Grumman signed a Reimbursable Space Act Agreement with NASA for use of the facilities. The company will assemble and test its new OmegA rocket inside the massive facility’s High Bay 2. The company also will modify MLP-3 to serve as the launch vehicle’s assembly and launch platform. Northrop Grumman is developing the OmegA rocket, an intermediate/heavy-class launch vehicle, as part of a launch services agreement with the U.S. Air Force.

CAPE CANAVERAL, Fla. -- A crawler-transporter rolls toward Launch Pad 39A at NASA's Kennedy Space Center in Florida. Operations are underway to move Mobile Launcher Platform-2, or MLP-2, from the pad to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- A crawler-transporter begins its climb to the hardstand at Launch Pad 39A at NASA's Kennedy Space Center in Florida. Operations are underway to move Mobile Launcher Platform-2, or MLP-2, from the pad to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - Lights on Launch Pad 39B put Space Shuttle Discovery in the spotlight after the rollback of the Rotating Service Structure (at left). The Space Shuttle sits on the Mobile Launcher Platform (MLP), which is 25 ft. high, 160 ft. long and 135 ft. wide. An MLP weighs 8,230,000 pounds. At the launch pad, with a fueled Shuttle on the 6-inch-thick decks, it weighs approximately12,700,000 pounds. There are three exhaust openings in the main deck of an MLP. Two are for the exhaust of the SRBs at launch and the third, a center opening, is for the exhaust from the main engines. SRB exhaust holes are 42 ft. long and 20 ft. wide. The main engine hole is 34 ft. long and 31 ft. wide. Discovery is scheduled to launch on the historic Return to Flight mission STS-114 at 3:51 p.m. July 13 with a crew of seven. On the mission to the International Space Station the crew will perform inspections on orbit for the first time of all of the Reinforced Carbon-Carbon (RCC) panels on the leading edge of the wings and the Thermal Protection System tiles using the new Canadian-built Orbiter Boom Sensor System and the data from 176 impact and temperature sensors. Mission Specialists will also practice repair techniques on RCC and tile samples during a spacewalk in the payload bay. During two additional spacewalks, the crew will install the External Stowage Platform-2, equipped with spare part assemblies, and a replacement Control Moment Gyroscope contained in the Lightweight Multi-Purpose Experiment Support Structure.

KENNEDY SPACE CENTER, FLA. - Lights on Launch Pad 39B put Space Shuttle Discovery in the spotlight after the rollback of the Rotating Service Structure. The Space Shuttle sits on the Mobile Launcher Platform (MLP), which is 25 ft. high, 160 ft. long and 135 ft. wide. An MLP weighs 8,230,000 pounds. At the launch pad, with a fueled Shuttle on the 6-inch-thick decks, it weighs approximately12,700,000 pounds. There are three exhaust openings in the main deck of an MLP. Two are for the exhaust of the SRBs at launch and the third, a center opening, is for the exhaust from the main engines. SRB exhaust holes are 42 ft. long and 20 ft. wide. The main engine hole is 34 ft. long and 31 ft. wide. Discovery is scheduled to launch on the historic Return to Flight mission STS-114 at 3:51 p.m. July 13 with a crew of seven. On the mission to the International Space Station the crew will perform inspections on orbit for the first time of all of the Reinforced Carbon-Carbon (RCC) panels on the leading edge of the wings and the Thermal Protection System tiles using the new Canadian-built Orbiter Boom Sensor System and the data from 176 impact and temperature sensors. Mission Specialists will also practice repair techniques on RCC and tile samples during a spacewalk in the payload bay. During two additional spacewalks, the crew will install the External Stowage Platform-2, equipped with spare part assemblies, and a replacement Control Moment Gyroscope contained in the Lightweight Multi-Purpose Experiment Support Structure.

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a truck sprays water along the crawlerway to reduce dust ahead of the crawler-transporter moving Mobile Launcher Platform-2, or MLP-2, from Launch Pad 39A to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a truck sprays water along the crawlerway to reduce dust ahead of the crawler-transporter moving Mobile Launcher Platform-2, or MLP-2, from Launch Pad 39A, in the background, to a nearby park site in Launch Complex 39. The historic launch pad was the site from which numerous Apollo and space shuttle missions began and is beginning a new mission as a commercial launch site. NASA signed a property agreement with Space Exploration Technologies Corp., or SpaceX, of Hawthorne, California, on April 14 for use and occupancy of the seaside complex along Florida's central east coast. It will serve as a platform for SpaceX to support their commercial launch activities. For more information on Launch Pad 39A, visit http://www.nasa.gov/centers/kennedy/pdf/167416main_LC39-08.pdf. For learn more about the crawler-transporter, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: NASA/Kim Shiflett