
A swing test of the Orion crew access arm, top right, is in progress on the mobile launcher at NASA's Kennedy Space Center in Florida, on Aug. 21, 2018. The crew access arm is located at about the 274-foot level on the mobile launcher tower. It will rotate from its retracted position and interface with the Orion crew hatch location to provide entry to the Orion crew module. Exploration Ground Systems extended all of the launch umbilicals on the ML tower to test their functionality before the mobile launcher, atop crawler-transporter 2, is moved to Launch Pad 39B and the Vehicle Assembly Building.

Crane specialists monitor the progress as the bracket for the Orion Service Module Umbilical (OSMU) is lifted up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

A crane and rigging lines are used to install the Interim Cryogenic Propulsion Stage Umbilical (ICPSU) high up on the mobile launcher (ML) at NASA's Kennedy Space Center in Florida. The last of the large umbilicals to be installed, the ICPSU will provide super-cooled hydrogen and liquid oxygen to the Space Launch System (SLS) rocket's interim cryogenic propulsion stage, or upper stage, at T-0 for Exploration Mission-1. The umbilical is located at about the 240-foot-level of the mobile launcher and will supply fuel, oxidizer, gaseous helium, hazardous gas leak detection, electrical commodities and environment control systems to the upper stage of the SLS rocket during launch. Exploration Ground Systems is overseeing installation of the umbilicals on the ML.

Under the watchful eye of technicians and engineers, a crane is prepared to lift the Orion crew access arm (CAA) so it can be attached to the mobile launcher (ML) at NASA's Kennedy Space Center in Florida. The arm will be installed at about the 274-foot level on the ML tower. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System, or SLS, rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

The second of two Tail Service Mast Umbilicals is lifted by crane for installation on the 0-level deck of the mobile launcher on July 27, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System (SLS) rocket core stage aft section and provide liquid hydrogen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

A crane is used to lift up the first of two Tail Service Mast Umbilicals for installation on the 0-level deck of the mobile launcher on July 12, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System rocket core stage aft section and provide liquid oxygen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

A long-exposure view of the mobile launcher at NASA's Kennedy Space Center in Florida. Cranes and rigging are being used to lift the bracket for the Orion Service Module Umbilical (OSMU) up for installation on the mobile launcher tower. The tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Seen to the right of the iconic Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, a crane positions the Orion crew access arm (CAA) so it can be attached to the mobile launcher (ML). The arm will be installed at about the 274-foot level on the ML tower. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System (SLS), rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

A view from below the mobile launcher shows a crane positioning the bracket for the Orion Service Module Umbilical (OSMU) high up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Crawler-transporter 2 (CT-2) is underneath the mobile launcher May 31, 2018, at NASA's Kennedy Space Center in Florida. Three lifts will be performed to practice lifting procedures, validate interface locations, confirm the weight of the mobile launcher, and develop a baseline for modal analysis. The mobile launcher is equipped with a number of lines, called umbilicals, which will connect to NASA's Space Launch System (SLS) and Orion. CT-2 has been upgraded to handle the weight of the mobile launcher with SLS and Orion atop. Exploration Ground Systems is preparing the ground systems necessary to support the SLS and Orion spacecraft for Exploration Mission-1 and deep space missions.

At NASA's Kennedy Space Center in Florida, construction workers on the deck of the mobile launcher install the final four vehicle support posts. A total of eight support posts are being installed to support the load of the Space Launch System's (SLS) solid rocket boosters, with four posts for each of the boosters. The support posts are about five feet tall and each weigh about 10,000 pounds. The posts will structurally support the SLS rocket through T-0 and liftoff, and will drop down before vehicle liftoff to avoid contact with the flight hardware. The Ground Systems Development and Operations Program is overseeing installation of the support posts to prepare for the launch of the Orion spacecraft atop the SLS rocket.

The mobile launcher (ML) is reflected in the sunglasses of a construction worker with JP Donovan at NASA's Kennedy Space Center in Florida. A crane is lifting the Interim Cryogenic Propulsion Stage Umbilical (ICPSU) up for installation on the tower of the ML. The last of the large umbilicals to be installed, the ICPSU will provide super-cooled hydrogen and liquid oxygen to the Space Launch System (SLS) rocket's interim cryogenic propulsion stage, or upper stage, at T-0 for Exploration Mission-1. The umbilical is located at about the 240-foot-level of the mobile launcher and will supply fuel, oxidizer, gaseous helium, hazardous gas leak detection, electrical commodities and environment control systems to the upper stage of the SLS rocket during launch. Exploration Ground Systems is overseeing installation of the umbilicals on the ML.

Construction workers with JP Donovan install the Interim Cryogenic Propulsion Stage Umbilical (ICPSU) at about the 240-foot-level of the mobile launcher (ML) tower at NASA's Kennedy Space Center in Florida. The last of the large umbilicals to be installed, the ICPSU will provide super-cooled hydrogen and liquid oxygen to the Space Launch System (SLS) rocket's interim cryogenic propulsion stage, or upper stage, at T-0 for Exploration Mission-1. The umbilical is located at about the 240-foot-level of the mobile launcher and will supply fuel, oxidizer, gaseous helium, hazardous gas leak detection, electrical commodities and environment control systems to the upper stage of the SLS rocket during launch. Exploration Ground Systems is overseeing installation of the umbilicals on the ML.

The second of two Tail Service Mast Umbilicals (TSMU), at left, is lowered for installation on the 0-level deck of the mobile launcher on July 27, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System (SLS) rocket core stage aft section and provide liquid hydrogen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. In view at right is the TSMU that will provide liquid oxygen and electrical cable connections to the core stage engine section. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

Just north of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, a crane lifts the core stage forward skirt umbilical for installation onto the mobile launcher. The mobile launcher is designed to support the assembly, testing and check-out of the agency's Space Launch System (SLS) rocket and the Orion spacecraft.

Technicians and engineers with Exploration Ground Systems at the NASA's Kennedy Space Center in Florida recently tested the Crew Access Arm (CAA) that was added on the mobile launcher being prepared to support the agency’s Orion spacecraft and Space Launch System rocket. The crucial test confirmed the functionality and integrity of the CAA. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch. The arm will provide entry and emergency egress for astronauts and technicians into and out of the Orion spacecraft.

Just north of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, the core stage forward skirt umbilical is installed on the mobile launcher. The mobile launcher is designed to support the assembly, testing and check-out of the agency's Space Launch System (SLS) rocket and the Orion spacecraft.

Preparations are underway to lift the bracket for the Orion Service Module Umbilical (OSMU) up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Construction workers with JP Donovan assist as a crane lifts the second of two Tail Service Mast Umbilicals up for installation on the 0-level deck of the mobile launcher on July 27, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System rocket core stage aft section and provide liquid hydrogen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

A crane and rigging are used to position the Orion Service Module Umbilical (OSMU) for installation high up on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Just north of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians prepare a crane to lift the core stage forward skirt umbilical for installation onto the mobile launcher. The mobile launcher is designed to support the assembly, testing and check-out of the agency's Space Launch System (SLS) rocket and the Orion spacecraft.

High up on the mobile launcher (ML) tower at NASA's Kennedy Space Center in Florida, construction workers assist as a crane moves the Core Stage Inter-tank Umbilical (CSITU) into place for a fit check of the attachment hardware. The CSITU will be located at about the 140-foot level of the ML tower. The umbilical will be lowered down and installed permanently on the ML at a later date. The CSITU is a swing-arm umbilical that will connect to the Space Launch System core stage inter-tank. It will provide conditioned air, pressurized gases and power and data connection to the core stage. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

NASA Administrator Jim Bridenstine tours the mobile launcher that will support the agency's Space Launch System rocket and Orion spacecraft that will liftoff on trips to the Moon, Mars and deep space. Bridenstine made his first official visit to the NASA's Florida spaceport on Aug. 6 and 7, 2018.

A long-exposure view of the mobile launcher at NASA's Kennedy Space Center in Florida. Cranes and rigging are being used to lift the bracket for the Orion Service Module Umbilical (OSMU) up for installation on the mobile launcher tower. The tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Construction workers assist as a crane lifts the Core Stage Forward Skirt Umbilical into position for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals that will connect to the Space Launch System (SLS) rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The CSFSU will be located at about the 180-foot level on the tower, above the liquid oxygen tank. The CSFSU is an umbilical that will swing into position to provide connections to the core stage forward skirt of the SLS rocket, and then swing away before launch. Its main purpose is to provide conditioned air/GN2 to the SLS core stage forward skirt cavity. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Preparations are underway to lift the bracket for the Orion Service Module Umbilical (OSMU) up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Preparations are underway to lift the bracket for the Orion Service Module Umbilical (OSMU) up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

At NASA's Kennedy Space Center in Florida, the final four vehicle support posts are being installed on the deck of the mobile launcher. A total of eight support posts are being installed to support the load of the Space Launch System's (SLS) solid rocket boosters, with four posts for each of the boosters. The support posts are about five feet tall and each weigh about 10,000 pounds. The posts will structurally support the SLS rocket through T-0 and liftoff, and will drop down before vehicle liftoff to avoid contact with the flight hardware. The Ground Systems Development and Operations Program is overseeing installation of the support posts to prepare for the launch of the Orion spacecraft atop the SLS rocket.

Viewed from the 274-foot level mobile launcher (ML), the Orion crew access arm (CAA) is beign installed on the tower. The CAA will support the Space launch System (SLS) rocket at NASA's Kennedy Space Center in Florida. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System, or SLS, rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

NASA Administrator Jim Bridenstine (second from left) is briefed on testing of the mobile launcher that will support the agency's Space Launch System rocket and Orion spacecraft that will liftoff on trips to the Moon, Mars and deep space. From the left, are Mike Bolger, Exploration Ground Systems program manager, Bridenstine, Cliff Lanham, Mobile Launcher Project Manager, and Center Director Bob Cabana. Bridenstine made his first official visit to the NASA's Kennedy Space Center on Aug. 6 and 7, 2018.

NASA Administrator Jim Bridenstine (center) is briefed by Cliff Lanham, Mobile Launcher Project Manager (left) and Kennedy Space Center Director Bob Cabana on testing of the mobile launcher that will support the agency's Space Launch System rocket and Orion spacecraft that will liftoff on trips to the Moon, Mars and deep space. Bridenstine made his first official visit to the NASA's Florida spaceport on Aug. 6 and 7, 2018.

A heavy-lift crane and rigging are used to lift the Core Stage Inter-tank Umbilical (CSITU) up to about the 140-foot level of the mobile launcher (ML) tower at NASA's Kennedy Space Center in Florida. The CSITU will be moved into place for a fit check of the attachment hardware. The umbilical will be lowered down and installed permanently on the ML at a later date. The CSITU is a swing-arm umbilical that will connect to the Space Launch System core stage inter-tank. It will provide conditioned air, pressurized gases and power and data connection to the core stage. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Technicians and engineers with Exploration Ground Systems at the NASA's Kennedy Space Center in Florida recently tested the Crew Access Arm (CAA) that was added on the mobile launcher being prepared to support the agency’s Orion spacecraft and Space Launch System rocket. The crucial test confirmed the functionality and integrity of the CAA. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch. The arm will provide entry and emergency egress for astronauts and technicians into and out of the Orion spacecraft.

A view of the mobile launcher (ML) taken from the "eyebrow" of the nearby Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The ML tower will be equipped with a number of lines, called umbilicals that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The Orion Service Module Umbilical and Core State Forward Skirt Umbilical were recently installed on the ML. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Crawler-transporter 2 (CT-2) is being moved under the mobile launcher May 31, 2018, at NASA's Kennedy Space Center in Florida. Three lifts will be performed to practice lifting procedures, validate interface locations, confirm the weight of the mobile launcher, and develop a baseline for modal analysis. The mobile launcher is equipped with a number of lines, called umbilicals, which will connect to NASA's Space Launch System (SLS) and Orion. CT-2 has been upgraded to handle the weight of the mobile launcher with SLS and Orion atop. Exploration Ground Systems is preparing the ground systems necessary to support the SLS and Orion spacecraft for Exploration Mission-1 and deep space missions.

Just north of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians prepare a crane to lift the core stage forward skirt umbilical for installation onto the mobile launcher. The mobile launcher is designed to support the assembly, testing and check-out of the agency's Space Launch System (SLS) rocket and the Orion spacecraft.

A heavy-lift crane moves the Core Stage Inter-tank Umbilical (CSITU) up to about the 140-foot level of the mobile launcher (ML) tower at NASA's Kennedy Space Center in Florida. The CSITU is moved into place for a fit check of the attachment hardware. The umbilical will be lowered down and installed permanently on the ML at a later date. The CSITU is a swing-arm umbilical that will connect to the Space Launch System core stage inter-tank. It will provide conditioned air, pressurized gases and power and data connection to the core stage. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Construction workers on the deck of the mobile launcher at NASA's Kennedy Space Center in Florida, prepare to install a vehicle support post. A total of eight support posts are being installed to support the load of the Space Launch System's (SLS) solid rocket boosters, with four posts for each of the boosters. The support posts are about five feet tall and each weigh about 10,000 pounds. The posts will structurally support the SLS rocket through T-0 and liftoff, and will drop down before vehicle liftoff to avoid contact with the flight hardware. The Ground Systems Development and Operations Program is overseeing installation of the support posts to prepare for the launch of the Orion spacecraft atop the SLS rocket.

The second of two Tail Service Mast Umbilicals is lifted by crane for installation on the 0-level deck of the mobile launcher on July 27, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System (SLS) rocket core stage aft section and provide liquid hydrogen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

In this view from high above on the mobile launcher tower, a crane is used to lower the second of two Tail Service Mast Umbilicals (TSMU) for installation on the 0-level deck of the mobile launcher on July 27, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System rocket core stage aft section and provide liquid hydrogen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. In view at right is the TSMU that will provide liquid oxygen and electrical cable connections to the core stage engine section. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

A swing test of the Orion crew access arm, topmost umbilical, is in progress on the mobile launcher at NASA's Kennedy Space Center in Florida, on Aug. 21, 2018. The crew access arm is located at about the 274-foot level on the mobile launcher tower. It will rotate from its retracted position and interface with the Orion crew hatch location to provide entry to the Orion crew module. Exploration Ground Systems extended all of the launch umbilicals on the ML tower to test their functionality before the mobile launcher, atop crawler-transporter 2, is moved to Launch Pad 39B and the Vehicle Assembly Building.

The 2017 class of astronaut candidates view the mobile launcher during a familiarization tour at NASA's Kennedy Space Center in Florida. The candidates toured center facilities, including the Neil Armstrong Operations and Checkout Building high bay; the Launch Control Center, Launch Pad 39B, and the Vehicle Assembly Building. They also toured Boeing's Commercial Crew and Cargo Facility, United Launch Alliance's Space Launch Complex 41 at Cape Canaveral Air Force Station, and SpaceX's Launch Pad 39A at Kennedy. The candidates will spend about two years getting to know the space station systems and learning how to spacewalk, speak Russian, control the International Space Station's robotic arm and fly T-38s, before they're eligible to be assigned to a mission.

Technicians and engineers with Exploration Ground Systems at the NASA's Kennedy Space Center in Florida recently tested the Crew Access Arm (CAA) that was added on the mobile launcher being prepared to support the agency’s Orion spacecraft and Space Launch System rocket. The crucial test confirmed the functionality and integrity of the CAA. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch. The arm will provide entry and emergency egress for astronauts and technicians into and out of the Orion spacecraft.

A swing test of the Orion crew access arm, top right, begins on the mobile launcher at NASA's Kennedy Space Center in Florida, on Aug. 21, 2018. The crew access arm is located at about the 274-foot level on the mobile launcher tower. It will rotate from its retracted position and interface with the Orion crew hatch location to provide entry to the Orion crew module. Exploration Ground Systems extended all of the launch umbilicals on the ML tower to test their functionality before the mobile launcher, atop crawler-transporter 2, is moved to Launch Pad 39B and the Vehicle Assembly Building.
Viewed from the 274-foot level mobile launcher (ML), technicians help install the Orion crew access arm (CAA) to the tower at NASA's Kennedy Space Center in Florida. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System (SLS), rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

At NASA's Kennedy Space Center in Florida, a crane is prepared to lift the Orion crew access arm (CAA) so it can be attached to the mobile launcher (ML). The arm will be installed at about the 274-foot level on the ML tower. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System, or SLS, rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

A heavy-lift crane and rigging are used to lift the Core Stage Inter-tank Umbilical (CSITU) up to about the 140-foot level of the mobile launcher (ML) tower at NASA's Kennedy Space Center in Florida. The CSITU will be moved into place for a fit check of the attachment hardware. The umbilical will be lowered down and installed permanently on the ML at a later date. The CSITU is a swing-arm umbilical that will connect to the Space Launch System core stage inter-tank. It will provide conditioned air, pressurized gases and power and data connection to the core stage. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Under the watchful eye of technicians and engineers, a crane is prepared to lift the Orion crew access arm (CAA) so it can be attached to the mobile launcher (ML) at NASA's Kennedy Space Center in Florida. The arm will be installed at about the 274-foot level on the ML tower. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System, or SLS, rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

A crane and rigging are used to position the Orion Service Module Umbilical (OSMU) for installation high up on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Preparations are underway to install the second of two Tail Service Mast Umbilicals on the 0-level deck of the mobile launcher on July 27, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System (SLS) rocket core stage aft section and provide liquid hydrogen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

The 2017 class of astronaut candidates get a close-up view of the mobile launcher during a familiarization tour at NASA's Kennedy Space Center in Florida. The candidates toured center facilities, including the Neil Armstrong Operations and Checkout Building high bay; the Launch Control Center, Launch Pad 39B, and the Vehicle Assembly Building. They also toured Boeing's Commercial Crew and Cargo Facility, United Launch Alliance's Space Launch Complex 41 at Cape Canaveral Air Force Station, and SpaceX's Launch Pad 39A at Kennedy. The candidates will spend about two years getting to know the space station systems and learning how to spacewalk, speak Russian, control the International Space Station's robotic arm and fly T-38s, before they're eligible to be assigned to a mission.

A crane lifts the Orion Service Module Umbilical (OSMU) high up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

A heavy-lift crane has been attached to the Core Stage Inter-tank Umbilical (CSITU) to lift it up from a flatbed truck near the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The CSITU will be lifted up to about the 140-foot level of the mobile launcher (ML) tower for a fit check of the attachment hardware. It will be lowered down and installed permanently on the ML at a later date. The CSITU is a swing-arm umbilical that will connect to the Space Launch System core stage inter-tank. It will provide conditioned air, pressurized gases and power and data connection to the core stage. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Cranes and rigging are being used to lift up the Core Stage Forward Skirt Umbilical (CSFSU) for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals that will connect to the Space Launch System (SLS) rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The CSFSU will be located at about the 180-foot level on the tower, above the liquid oxygen tank. The CSFSU is an umbilical that will swing into position to provide connections to the core stage forward skirt of the SLS rocket, and then swing away before launch. Its main purpose is to provide conditioned air/GN2 to the SLS core stage forward skirt cavity. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

A construction worker welds a metal part during installation of the Core Stage Forward Skirt Umbilical on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals that will connect to the Space Launch System (SLS) rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The CSFSU will be located at about the 180-foot level on the tower, above the liquid oxygen tank. The CSFSU is an umbilical that will swing into position to provide connections to the core stage forward skirt of the SLS rocket, and then swing away before launch. Its main purpose is to provide conditioned air/GN2 to the SLS core stage forward skirt cavity. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

At NASA's Kennedy Space Center in Florida, a crane lifts the Orion crew access arm (CAA) so it can be attached to the mobile launcher (ML). The arm will be installed at about the 274-foot level on the ML tower. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System (SLS), rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

NASA Administrator Jim Bridenstine (left) is briefed by Kennedy Space Center Director Bob Cabana on testing of the mobile launcher that will support the agency's Space Launch System rocket and Orion spacecraft that will liftoff on trips to the Moon, Mars and deep space. Bridenstine made his first official visit to the NASA's Florida spaceport on Aug. 6 and 7, 2018.

The first of two Tail Service Mast Umbilicals is lowered onto the 0-level deck of the mobile launcher on July 12, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System rocket core stage aft section and provide liquid oxygen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

A crane has been attached to the Core Stage Forward Skirt Umbilical (CSFSU) to lift it up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals that will connect to the Space Launch System (SLS) rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The CSFSU will be located at about the 180-foot level on the tower, above the liquid oxygen tank. The CSFSU is an umbilical that will swing into position to provide connections to the core stage forward skirt of the SLS rocket, and then swing away before launch. Its main purpose is to provide conditioned air/GN2 to the SLS core stage forward skirt cavity. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Just north of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, the core stage forward skirt umbilical is installed on the mobile launcher. The mobile launcher is designed to support the assembly, testing and check-out of the agency's Space Launch System (SLS) rocket and the Orion spacecraft.

Construction workers assist as a crane lifts the Core Stage Forward Skirt Umbilical into position for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals that will connect to the Space Launch System (SLS) rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The CSFSU will be located at about the 180-foot level on the tower, above the liquid oxygen tank. The CSFSU is an umbilical that will swing into position to provide connections to the core stage forward skirt of the SLS rocket, and then swing away before launch. Its main purpose is to provide conditioned air/GN2 to the SLS core stage forward skirt cavity. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

A crane and rigging are used to lift the Orion Service Module Umbilical (OSMU) high up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

A crane and rigging are used to position the Orion Service Module Umbilical (OSMU) for installation high up on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

A swing test of the Orion crew access arm is in progress on the mobile launcher at NASA's Kennedy Space Center in Florida, on Aug. 21, 2018. The crew access arm is located at about the 274-foot level on the mobile launcher tower. It will rotate from its retracted position and interface with the Orion crew hatch location to provide entry to the Orion crew module. Exploration Ground Systems extended all of the launch umbilicals on the ML tower to test their functionality before the mobile launcher, atop crawler-transporter 2, is moved to Launch Pad 39B and the Vehicle Assembly Building.

A crane and rigging lines are used to install the Interim Cryogenic Propulsion Stage Umbilical (ICPSU) high up on the mobile launcher (ML) at NASA's Kennedy Space Center in Florida. The last of the large umbilicals to be installed, the ICPSU will provide super-cooled hydrogen and liquid oxygen to the Space Launch System (SLS) rocket's interim cryogenic propulsion stage, or upper stage, at T-0 for Exploration Mission-1. The umbilical is located at about the 240-foot-level of the mobile launcher and will supply fuel, oxidizer, gaseous helium, hazardous gas leak detection, electrical commodities and environment control systems to the upper stage of the SLS rocket during launch. Exploration Ground Systems is overseeing installation of the umbilicals on the ML.

Construction workers and crane specialists high up on the mobile launcher tower monitor the progress as a crane positions the bracket for the Orion Service Module Umbilical (OSMU) for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

At NASA's Kennedy Space Center in Florida, a crane lifts the Orion crew access arm (CAA) so it can be attached to the mobile launcher (ML). The arm will be installed at about the 274-foot level on the ML tower. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System (SLS), rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

Crane specialists monitor the progress as the bracket for the Orion Service Module Umbilical (OSMU) is lifted high up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Crawler-transporter 2 (CT-2) is moved under the mobile launcher May 31, 2018, at NASA's Kennedy Space Center in Florida. Three lifts will be performed to practice lifting procedures, validate interface locations, confirm the weight of the mobile launcher, and develop a baseline for modal analysis. The mobile launcher is equipped with a number of lines, called umbilicals, which will connect to NASA's Space Launch System (SLS) and Orion. CT-2 has been upgraded to handle the weight of the mobile launcher with SLS and Orion atop. Exploration Ground Systems is preparing the ground systems necessary to support the SLS and Orion spacecraft for Exploration Mission-1 and deep space missions.

The 2017 class of astronaut candidates get a close-up view of the mobile launcher during a familiarization tour at NASA's Kennedy Space Center in Florida. The candidates toured center facilities, including the Neil Armstrong Operations and Checkout Building high bay; the Launch Control Center, Launch Pad 39B, and the Vehicle Assembly Building. They also toured Boeing's Commercial Crew and Cargo Facility, United Launch Alliance's Space Launch Complex 41 at Cape Canaveral Air Force Station, and SpaceX's Launch Pad 39A at Kennedy. The candidates will spend about two years getting to know the space station systems and learning how to spacewalk, speak Russian, control the International Space Station's robotic arm and fly T-38s, before they're eligible to be assigned to a mission.

A long-exposure view of the mobile launcher at NASA's Kennedy Space Center in Florida. Cranes and rigging are being used to lift the bracket for the Orion Service Module Umbilical (OSMU) up for installation on the mobile launcher tower. The tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

A brilliant sunrise serves as the backdrop in this panoramic view of the mobile launcher at NASA's Kennedy Space Center in Florida. The mobile launcher is equipped with a number of lines, called umbilicals, which will connect to NASA's Space Launch System (SLS) and Orion spacecraft. Exploration Ground Systems is preparing the mobile launcher and ground systems necessary to process and launch the SLS and Orion spacecraft on Exploration Mission-1 and deep space missions.

Technicians and engineers with Exploration Ground Systems at the NASA's Kennedy Space Center in Florida recently tested the Crew Access Arm (CAA) that was added on the mobile launcher being prepared to support the agency’s Orion spacecraft and Space Launch System rocket. The crucial test confirmed the functionality and integrity of the CAA. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch. The arm will provide entry and emergency egress for astronauts and technicians into and out of the Orion spacecraft.

The first of two Tail Service Mast Umbilicals is lifted up for installation on the 0-level deck of the mobile launcher on July 12, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System rocket core stage aft section and provide liquid oxygen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

A heavy-lift crane has been attached to the Core Stage Inter-tank Umbilical (CSITU) to lift it up from a flatbed truck near the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The CSITU will be lifted up to about the 140-foot level of the mobile launcher (ML) tower for a fit check of the attachment hardware. It will be lowered down and installed permanently on the ML at a later date. The CSITU is a swing-arm umbilical that will connect to the Space Launch System core stage inter-tank. It will provide conditioned air, pressurized gases and power and data connection to the core stage. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Construction workers with JP Donovan monitor operations as a crane is used to lower the first of two Tail Service Mast Umbilicals for installation on the 0-level deck of the mobile launcher on July 12, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System rocket core stage aft section and provide liquid oxygen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

A construction worker monitors the progress as crawler-transporter 2 (CT-2) lifts the mobile launcher up a few inches from its support posts June 1, 2018, at NASA's Kennedy Space Center in Florida. Three lifts were performed to practice lifting procedures, validate interface locations, confirm the weight of the mobile launcher, and develop a baseline for modal analysis. The mobile launcher is equipped with a number of lines, called umbilicals, which will connect to NASA's Space Launch System (SLS) and Orion. The lift helped to test the capability of the upgraded CT-2 to handle the weight of the mobile launcher. Exploration Ground Systems is preparing the ground systems necessary to support the SLS and Orion spacecraft for Exploration Mission-1 and deep space missions.

A heavy-lift crane slowly lifts the Interim Cryogenic Propulsion Stage Umbilical (ICPSU) high up for installation on the tower of the mobile launcher (ML) at NASA's Kennedy Space Center in Florida. The last of the large umbilicals to be installed, the ICPSU will provide super-cooled hydrogen and liquid oxygen to the Space Launch System (SLS) rocket's interim cryogenic propulsion stage, or upper stage, at T-0 for Exploration Mission-1. The umbilical is located at about the 240-foot-level of the mobile launcher and will supply fuel, oxidizer, gaseous helium, hazardous gas leak detection, electrical commodities and environment control systems to the upper stage of the SLS rocket during launch. Exploration Ground Systems is overseeing installation of the umbilicals on the ML.

The 2017 class of astronaut candidates pause for a group photograph on the deck of the mobile launcher during a familiarization tour at NASA's Kennedy Space Center in Florida. The candidates toured center facilities, including the Neil Armstrong Operations and Checkout Building high bay; the Launch Control Center, Launch Pad 39B, and the Vehicle Assembly Building. They also toured Boeing's Commercial Crew and Cargo Facility, United Launch Alliance's Space Launch Complex 41 at Cape Canaveral Air Force Station, and SpaceX's Launch Pad 39A at Kennedy. The candidates will spend about two years getting to know the space station systems and learning how to spacewalk, speak Russian, control the International Space Station's robotic arm and fly T-38s, before they're eligible to be assigned to a mission.

Just north of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, the core stage forward skirt umbilical is prepped and rigged for installation onto the mobile launcher. The mobile launcher is designed to support the assembly, testing and check-out of the agency's Space Launch System (SLS) rocket and the Orion spacecraft.

A heavy-lift crane moves the Core Stage Inter-tank Umbilical (CSITU) up to about the 140-foot level of the mobile launcher (ML) tower at NASA's Kennedy Space Center in Florida. The CSITU is moved into place for a fit check of the attachment hardware. The umbilical will be lowered down and installed permanently on the ML at a later date. The CSITU is a swing-arm umbilical that will connect to the Space Launch System core stage inter-tank. It will provide conditioned air, pressurized gases and power and data connection to the core stage. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Technicians and engineers with Exploration Ground Systems at the NASA's Kennedy Space Center in Florida recently tested the Crew Access Arm (CAA) that was added on the mobile launcher being prepared to support the agency’s Orion spacecraft and Space Launch System rocket. The crucial test confirmed the functionality and integrity of the CAA. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch. The arm will provide entry and emergency egress for astronauts and technicians into and out of the Orion spacecraft.

A crane is used to lift up the first of two Tail Service Mast Umbilicals for installation on the 0-level deck of the mobile launcher on July 12, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System rocket core stage aft section and provide liquid oxygen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

Preparations are underway May 31, 2018, to move crawler-transporter 2 (CT-2) under the mobile launcher at NASA's Kennedy Space Center in Florida. Three lifts will be performed to practice lifting procedures, validate interface locations, confirm the weight of the mobile launcher, and develop a baseline for modal analysis. The mobile launcher is equipped with a number of lines, called umbilicals, which will connect to NASA's Space Launch System (SLS) and Orion. CT-2 has been upgraded to handle the weight of the mobile launcher with SLS and Orion atop. Exploration Ground Systems is preparing the ground systems necessary to support the SLS and Orion spacecraft for Exploration Mission-1 and deep space missions.

The second of two Tail Service Mast Umbilicals (TSMU), at left, is lowered for installation on the 0-level deck of the mobile launcher on July 27, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System (SLS) rocket core stage aft section and provide liquid hydrogen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. In view at right is the TSMU that will provide liquid oxygen and electrical cable connections to the core stage engine section. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

Cranes and rigging are being used to lift up the Core Stage Forward Skirt Umbilical (CSFSU) for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals that will connect to the Space Launch System (SLS) rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The CSFSU will be located at about the 180-foot level on the tower, above the liquid oxygen tank. The CSFSU is an umbilical that will swing into position to provide connections to the core stage forward skirt of the SLS rocket, and then swing away before launch. Its main purpose is to provide conditioned air/GN2 to the SLS core stage forward skirt cavity. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

The second of two Tail Service Mast Umbilicals is lifted by crane for installation on the 0-level deck of the mobile launcher on July 27, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System (SLS) rocket core stage aft section and provide liquid hydrogen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

The first of two Tail Service Mast Umbilicals is lifted up for installation on the 0-level deck of the mobile launcher on July 12, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System rocket core stage aft section and provide liquid oxygen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

Construction workers with JP Donovan assist with preparations to lift and install the Interim Cryogenic Propulsion Stage Umbilical on the tower of the mobile launcher at NASA's Kennedy Space Center in Florida. The last of the large umbilicals to be installed, the ICPSU will provide super-cooled hydrogen and liquid oxygen to the Space Launch System (SLS) rocket's interim cryogenic propulsion stage, or upper stage, at T-0 for Exploration Mission-1. The umbilical is located at about the 240-foot-level of the mobile launcher and will supply fuel, oxidizer, gaseous helium, hazardous gas leak detection, electrical commodities and environment control systems to the upper stage of the SLS rocket during launch. Exploration Ground Systems is overseeing installation of the umbilicals on the ML.

Just north of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians prepare a crane to lift the core stage forward skirt umbilical (CSFSU) for installation onto the mobile launcher. The mobile launcher is designed to support the assembly, testing and check-out of the agency's Space Launch System (SLS) rocket and the Orion spacecraft.

Viewed from the 274-foot level mobile launcher (ML), a crane positions the Orion crew access arm (CAA) so it can be attached to the tower that will support the Space launch System (SLS) rocket at NASA's Kennedy Space Center in Florida. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the SLS, rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

A crane and rigging are used to lift the Orion Service Module Umbilical (OSMU) high up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Viewed from the 274-foot level mobile launcher (ML), a technician begins installation of the Orion crew access arm (CAA) to the tower. The CAA will support the Space launch System (SLS) rocket at NASA's Kennedy Space Center in Florida. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System, or SLS, rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

A swing test of the Orion crew access arm, topmost umbilical, is in progress on the mobile launcher at NASA's Kennedy Space Center in Florida, on Aug. 21, 2018. The crew access arm is located at about the 274-foot level on the mobile launcher tower. It will rotate from its retracted position and interface with the Orion crew hatch location to provide entry to the Orion crew module. Exploration Ground Systems extended all of the launch umbilicals on the ML tower to test their functionality before the mobile launcher, atop crawler-transporter 2, is moved to Launch Pad 39B and the Vehicle Assembly Building.

Construction workers assist as a crane lifts the Core Stage Forward Skirt Umbilical up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals that will connect to the Space Launch System (SLS) rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The CSFSU will be located at about the 180-foot level on the tower, above the liquid oxygen tank. The CSFSU is an umbilical that will swing into position to provide connections to the core stage forward skirt of the SLS rocket, and then swing away before launch. Its main purpose is to provide conditioned air/GN2 to the SLS core stage forward skirt cavity. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

A crane and rigging are used to lift the Orion Service Module Umbilical (OSMU) high up for installation on the mobile launcher tower at NASA's Kennedy Space Center in Florida. The mobile launcher tower will be equipped with a number of lines, called umbilicals, that will connect to the Space Launch System rocket and Orion spacecraft for Exploration Mission-1 (EM-1). The OSMU will be located high on the mobile launcher tower and, prior to launch, will transfer liquid coolant for the electronics and air for the Environmental Control System to the Orion service module that houses these critical systems to support the spacecraft. EM-1 is scheduled to launch in 2018. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.

Under the watchful eye of technicians and engineers, a crane is prepared to lift the Orion crew access arm (CAA) so it can be attached to the mobile launcher (ML) at NASA's Kennedy Space Center in Florida. The arm will be installed at about the 274-foot level on the ML tower. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System, or SLS, rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

Under the watchful eye of technicians and engineers, a crane begins lifting the Orion crew access arm (CAA) so it can be attached to the mobile launcher (ML) at NASA's Kennedy Space Center in Florida. The arm will be installed at about the 274-foot level on the ML tower. NASA's Exploration Ground Systems organization has been overseeing installation of umbilicals and other launch accessories on the 380-foot-tall ML in preparation for stacking the first launch of the Space launch System (SLS), rocket with an Orion spacecraft. The CAA is designed to rotate from its retracted position and line up with Orion's crew hatch providing entry for astronauts and technicians.

The second of two Tail Service Mast Umbilicals is lowered by crane for installation on the 0-level deck of the mobile launcher on July 27, at NASA's Kennedy Space Center in Florida. The 35-foot-tall umbilical will connect to NASA's Space Launch System (SLS) rocket core stage aft section and provide liquid hydrogen and electrical cable connections to the core stage engine section to support propellant handling during prelaunch operations. The installation brings Exploration Ground Systems one step closer to supporting prelaunch operations for the agency's SLS rocket and Orion spacecraft on Exploration Mission-1 and deep space destinations.

High up on the mobile launcher (ML) tower at NASA's Kennedy Space Center in Florida, construction workers assist as a crane moves the Core Stage Inter-tank Umbilical (CSITU) into place for a fit check of the attachment hardware. The CSITU will be located at about the 140-foot level of the ML tower. The umbilical will be lowered down and installed permanently on the ML at a later date. The CSITU is a swing-arm umbilical that will connect to the Space Launch System core stage inter-tank. It will provide conditioned air, pressurized gases and power and data connection to the core stage. The Ground Systems Development and Operations Program is overseeing installation of the umbilicals.