Former NASA astronaut and co-chair of the local organizing committee for the International Astronautical Congress Sandy Magnus is seen during an interactive STEM discussion with students attending the 70th International Astronautical Congress, Wednesday, Oct. 23, 2019, at NASA Headquarters in Washington. Photo Credit: (NASA/Joel Kowsky)

JSC2010-E-181455 (27 Oct. 2010) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, gets help donning a training version of her Extravehicular Mobility Unit (EMU) spacesuit in preparation for a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. NASA astronaut Chris Ferguson, commander, assisted Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2010-E-181478 (27 Oct. 2010) --- Attired in a training version of her Extravehicular Mobility Unit (EMU) spacesuit, NASA astronaut Sandy Magnus, STS-135 mission specialist, is about to be submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Divers (out of frame) are in the water to assist Magnus in her rehearsal, which is intended to help prepare her for work on the exterior of the International Space Station. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2010-E-181484 (27 Oct. 2010) --- Attired in a training version of her Extravehicular Mobility Unit (EMU) spacesuit, NASA astronaut Sandy Magnus, STS-135 mission specialist, participates in a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Divers are in the water to assist Magnus in her rehearsal, which is intended to help prepare her for work on the exterior of the International Space Station. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2010-E-181461 (27 Oct. 2010) --- Attired in a training version of her Extravehicular Mobility Unit (EMU) spacesuit, NASA astronaut Sandy Magnus, STS-135 mission specialist, is about to be submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Divers (out of frame) are in the water to assist Magnus in her rehearsal, which is intended to help prepare her for work on the exterior of the International Space Station. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2010-E-181466 (27 Oct. 2010) --- NASA astronaut Chris Ferguson, STS-135 commander, helps NASA astronaut Sandy Magnus, mission specialist, don a training version of her Extravehicular Mobility Unit (EMU) spacesuit in preparation for a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2010-E-181442 (27 Oct. 2010) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, gets help donning a training version of her Extravehicular Mobility Unit (EMU) spacesuit in preparation for a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. NASA astronaut Chris Ferguson, commander, is at center. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

201108160008hq (16 Aug. 2011) --- Stephen Colbert, host of The Colbert Report, salutes the crew of STS-135, seated from lower left, NASA astronauts Chris Ferguson, commander; Doug Hurley, pilot; Sandy Magnus and Rex Walheim, both mission specialists, during their appearance for a taping of his television show, Aug. 16, 2011, in New York. The astronauts from STS-135 are in New York for a three-day visit. Photo credit: NASA/Paul E. Alers

Jody Singer, Director of NASA’s Marshall Space Flight Center, left, moderates a discussion with NASA Administrator Jim Bridenstine, NASA astronauts Jeanette Epps and Doug Wheelock, and former NASA astronaut and co-chair of the local organizing committee for the International Astronautical Congress Sandy Magnus, during an interactive STEM discussion with students attending the 70th International Astronautical Congress, Wednesday, Oct. 23, 2019, at NASA Headquarters in Washington. Photo Credit: (NASA/Joel Kowsky)

From left, astronauts Pam Melroy; Kay Hire; Cady Coleman; Kathy Sullivan; Tam O'Shaughnessy, Sally Ride's life partner and chair, board of directors of Sally Ride Science; astronauts Bonnie Dunbar; Sandy Magnus; Julie Payette; and Ellen Ochoa, pose for a photograph before a National Tribute to Sally Ride at the John F. Kennedy Center for the Performing Arts, Monday, May 20, 2013 in Washington. Photo Credit: (NASA/Bill Ingalls)

JSC2011-E-039719 (11 Feb. 2011) --- NASA astronaut Sandy Magnus, mission specialist. Photo credit: NASA

Photograph final space shuttle crew training session in the NBL with STS-135 Mission Specialists Sandy Magnus & Rex Walheim. STS-135 Commander Chris Ferguson serves as Intravehicular suit-up lead, Pilot Doug Hurley serves as robotic arm operator. Mission Specialists Sandy Magnus & Rex Walheim in the water. Photo Date: June 13, 2011. Location: NBL - Pool Topside. Photographer: Robert Markowitz

Photograph final space shuttle crew training session in the NBL with STS-135 Mission Specialists Sandy Magnus & Rex Walheim. STS-135 Commander Chris Ferguson serves as Intravehicular suit-up lead, Pilot Doug Hurley serves as robotic arm operator. Mission Specialists Sandy Magnus & Rex Walheim in the water. Photo Date: June 13, 2011. Location: NBL - Pool Topside. Photographer: Robert Markowitz

JOHNSON SPACE CENTER, Houston, Texas --- JSC2011-E-039719 --- NASA astronaut Sandy Magnus, mission specialist. Photo credit: NASA or National Aeronautics and Space Administration

NASA astronaut Sandy Magnus waves as she is lowered into the water to train for spacewalk in the Neutral Buoyancy Laboratory (NBL) on Tuesday, March 22, 2011, in Houston. ( NASA Photo / Houston Chronicle, Smiley N. Pool )

JSC2011-E-058624 (24 June 2011) --- STS-135 crew members participate in a flight data file review in the Flight Operations Facility at NASA?s Johnson Space Center. Pictured seated from the left are NASA astronauts Chris Ferguson, commander; Doug Hurley, pilot; along with Sandy Magnus and Rex Walheim, both mission specialists. Instructor Sandy Wayne assisted the crew members. Photo credit: NASA

JSC2011-E-016254 (9 Feb. 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, dons a training version of her shuttle launch and entry suit in preparation for a water survival training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. United Space Alliance suit technician John Hazelhurst assisted Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-029011 (21 March 2011) --- NASA astronauts Rex Walheim (left) and Sandy Magnus, both STS-135 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. EVA instructor Art Thomason assisted Walheim and Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-054032 (13 June 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, attired in a training version of her Extravehicular Mobility Unit (EMU) spacesuit, prepares for a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Astronaut Chris Ferguson, commander, assisted Magnus. Photo credit: NASA

JSC2010-E-195522 (3 Dec. 2010) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, participates in an emergency egress training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Crew instructor Patrick Jones assisted Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-040284 (24 March 2011) --- NASA astronauts Doug Hurley and Sandy Magnus set up the middeck in the Full-Fuselage Trainer as the crew of STS-135 participates in a post insertion training session March 24, 2011 in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center in Houston. Hurley is the pilot and Magnus is one of two mission specialists assigned to the flight. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool

JSC2011-E-029017 (21 March 2011) --- NASA astronauts Rex Walheim (center) and Sandy Magnus, both STS-135 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. EVA instructor Art Thomason assisted Walheim and Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

S135-E-007478 (12 July 2011) --- Surrounded by supplies and spare parts in the Raffaello multi-purpose logistics module, NASA astronaut Sandy Magnus continues her role as "load master" for the joint activities of the Atlantis and International Space Station crews. The tons of items are for use and consumption for the station and its crews. Raffaello was transported up to the station by Magnus and her three crewmates aboard the space shuttle. Photo credit: NASA

JSC2011-E-029013 (21 March 2011) --- NASA astronauts Rex Walheim (left) and Sandy Magnus, both STS-135 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. EVA instructor Art Thomason assisted Walheim and Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-054092 (13 June 2011) --- NASA astronauts Rex Walheim and Sandy Magnus (mostly obscured), both STS-135 mission specialists, attired in training versions of their Extravehicular Mobility Unit (EMU) spacesuits, are raised from the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center as a spacewalk training session comes to a close. Divers (out of frame) were in the water to assist Magnus and Walheim in their rehearsal. Photo credit: NASA

JSC2011-E-029056 (21 March 2011) --- NASA astronauts Rex Walheim (right) and Sandy Magnus, both STS-135 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. EVA instructors John Ray (left foreground) and Art Thomason assisted Walheim and Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-023112 (2 March 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, dons a training version of her shuttle launch and entry suit in preparation for a training session in the fixed-base shuttle mission simulator (SMS) in the Jake Garn Simulation and Training Facility at NASA's Johnson Space Center. Suit technician Toni Cost-Davis assisted Magnus. Photo credit: NASA or National Aeronautics and Space Administration

ISS028-E-017077 (16 July 2011) --- When asked by a reporter if she noticed a difference in the International Space Station on her current visit with the Atlantis STS-135 crew, versus an earlier lengthy visit, NASA astronaut Sandy Magnus mentioned the Cupola's addition, which was not on the station during her earlier stay there. This is one of series of photos showing Magnus, mission specialist for the Space Shuttle Program's final flight, taking advantage of the zero gravity of space and the panoramic view provided by the multi-windowed Cupola.

ISS028-E-017083 (16 July 2011) --- When asked by a reporter if she noticed a difference in the International Space Station on her current visit with the Atlantis STS-135 crew, versus an earlier lengthy visit, NASA astronaut Sandy Magnus mentioned the Cupola's addition, which was not on the station during her earlier stay there. This is one of series of photos showing Magnus, mission specialist for the Space Shuttle Program's final flight, taking advantage of the zero gravity of space and the panoramic view provided by the multi-windowed Cupola.

S135-E-007420 (11 July 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, may well be thinking of the word "ocean" for two reasons. Her navigation in the weightlessness of space could be loosely compared to swimming, and she is surrounded by an "ocean” of supplies and equipment in the Raffaello multi-purpose logistics module. The supplies and spare parts are for use and consumption for the International Space Station and its crews. Raffaello was transported up to the station by Magnus and her three crewmates aboard the space shuttle Atlantis. Photo credit: NASA

JSC2011-E-054089 (13 June 2011) --- NASA astronauts Rex Walheim and Sandy Magnus (mostly obscured), both STS-135 mission specialists, attired in training versions of their Extravehicular Mobility Unit (EMU) spacesuits, are raised from the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center as a spacewalk training session comes to a close. Divers were in the water to assist Magnus and Walheim in their rehearsal. Photo credit: NASA

S135-E-006208 (8 July 2011) --- NASA astronauts Sandy Magnus, mission specialist, and Doug Hurley, pilot, are pictured on the flight deck of space shuttle Atlantis en route to the International Space Station. Magnus sat behind the commander and pilot for the launch phase of the Space Shuttle Program's final flight, and doubled as flight engineer. Photo credit: NASA

JSC2011-E-029042 (21 March 2011) --- NASA astronauts Rex Walheim (second left) and Sandy Magnus, both STS-135 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. EVA instructors John Ray (left foreground) and Art Thomason assisted Walheim and Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-054033 (13 June 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, attired in a training version of her Extravehicular Mobility Unit (EMU) spacesuit, prepares for a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Astronaut Chris Ferguson, commander, assisted Magnus. Photo credit: NASA

JSC2011-E-054076 (13 June 2011) --- NASA astronauts Sandy Magnus and Rex Walheim (mostly obscured), both STS-135 mission specialists, attired in training versions of their Extravehicular Mobility Unit (EMU) spacesuits, are about to be submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Divers are in the water to assist Magnus and Walheim in their rehearsal. Photo credit: NASA

JSC2011-E-029044 (21 March 2011) --- NASA astronauts Rex Walheim (left) and Sandy Magnus, both STS-135 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. EVA instructors John Ray (right background) and Art Thomason assisted Walheim and Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-029062 (21 March 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, participates in a training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Crew instructors assisted Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-029041 (21 March 2011) --- NASA astronauts Rex Walheim (right) and Sandy Magnus, both STS-135 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. EVA instructors John Ray (left foreground) and Art Thomason assisted Walheim and Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

ISS028-E-017042 (16 July 2011) --- When asked by a reporter if she noticed a difference in the International Space Station on her current visit with the Atlantis STS-135 crew, versus an earlier lengthy visit, NASA astronaut Sandy Magnus mentioned the Cupola's addition, which was not on the station during her earlier stay there. This is one of series of photos showing Magnus, mission specialist for the Space Shuttle Program's final flight, taking advantage of the zero gravity of space and the panoramic view provided by the multi-windowed Cupola.

S135-E-007479 (12 July 2011) --- Surrounded by supplies and spare parts in the Raffaello multi-purpose logistics module, NASA astronaut Sandy Magnus continues her role as "load master" for the joint activities of the Atlantis and International Space Station crews. The tons of items are for use and consumption for the station and its crews. Raffaello was transported up to the station by Magnus and her three crewmates aboard the space shuttle. Photo credit: NASA

ISS028-E-017074 (16 July 2011) --- When asked by a reporter if she noticed a difference in the International Space Station on her current visit with the Atlantis STS-135 crew, versus an earlier lengthy visit, NASA astronaut Sandy Magnus mentioned the Cupola's addition, which was not on the station during her earlier stay there. This is one of series of photos showing Magnus, mission specialist for the Space Shuttle Program's final flight, taking advantage of the zero gravity of space and the panoramic view provided by the multi-windowed Cupola.

JSC2011-E-029027 (21 March 2011) --- NASA astronauts Rex Walheim (center) and Sandy Magnus, both STS-135 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. EVA instructor Art Thomason assisted Walheim and Magnus. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

ISS028-E-017067 (16 July 2011) --- When asked by a reporter if she noticed a difference in the International Space Station on her current visit with the Atlantis STS-135 crew, versus an earlier lengthy visit, NASA astronaut Sandy Magnus mentioned the Cupola's addition, which was not on the station during her earlier stay there. This is one of series of photos showing Magnus, mission specialist for the Space Shuttle Program's final flight, taking advantage of the zero gravity of space and the panoramic view provided by the multi-windowed Cupola.

JSC2011-E-043872 (29 April 2011) --- NASA astronauts Sandy Magnus and Rex Walheim, both STS-135 mission specialists, participate in an EVA Thermal Protection System (TPS) overview training session in the TPS/Precision Air Bearing Facility in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. A crew instructor (right) assisted Magnus and Walheim. Photo credit: NASA

S135-E-006312 (9 July 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured on the aft flight deck of the space shuttle Atlantis during the flight's second day of activities in Earth orbit. Photo credit: NASA

JSC2011-E-058647 (24 June 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, participates in a flight data file review in the Flight Operations Facility at NASA?s Johnson Space Center. Photo credit: NASA

JSC2011-E-028150 (23 March 2011) --- NASA astronauts Doug Hurley, STS-135 pilot; and Sandy Magnus (foreground), mission specialist, participate in an exercise in the systems engineering simulator in the Avionics Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration

S135-E-007435 (11 July 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured in the U.S. lab or Destiny on the International Space Station during the fourth day in space for the Atlantis crew and the second day while the two spacecraft are docked in Earth orbit. Photo credit: NASA

ISS028-E-017365 (17 July 2011) --- NASA astronauts Ron Garan, Expedition 28 flight engineer, and Sandy Magnus, STS-135 mission specialist, work with a pulled rack in the U.S. lab or Destiny aboard the International Space Station.

JSC2011-E-060756 (29 June 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, participates in a training session with the crew compartment trainer (CCT-2) in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Here, she is briefed on the operation of the hatch. Photo credit: NASA

JSC2011-E-060424 (30 June 2011) --- NASA astronauts Sandy Magnus and Rex Walheim, both STS-135 mission specialists, are pictured during a preflight press conference at NASA's Johnson Space Center. Photo credit: NASA

JSC2011-E-060422 (30 June 2011) --- NASA astronauts Sandy Magnus and Rex Walheim, both STS-135 mission specialists, are pictured during a preflight press conference at NASA's Johnson Space Center. Photo credit: NASA

JSC2011-E-060415 (30 June 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, responds to a question from a reporter during a preflight press conference at NASA's Johnson Space Center. Photo credit: NASA

JSC2011-E-028153 (23 March 2011) --- NASA astronauts Doug Hurley, STS-135 pilot; and Sandy Magnus (foreground), mission specialist, participate in an exercise in the systems engineering simulator in the Avionics Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration

S135-E-007284 (10 July 2011) – From left, NASA astronauts Chris Ferguson, Sandy Magnus and Rex Walheim are pictured on the flight deck of the space shuttle Atlantis during rendezvous and docking operations with the International Space Station. Photo credit: NASA

JSC2011-E-028151 (23 March 2011) --- NASA astronauts Doug Hurley, STS-135 pilot; and Sandy Magnus (foreground), mission specialist, participate in an exercise in the systems engineering simulator in the Avionics Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration

The crew of STS-135, from left, Doug Hurley, Chris Ferguson, Sandy Magnus and Rex Walheim walk between buildings at the Johnson Space Center after a simulation in the motion based simulator on Friday, May 6, 2011, in Houston. ( NASA Photo / Houston Chronicle, Smiley N. Pool ).

S135-E-008732 (16 July 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured in the U.S. lab or Destiny on the International Space Station during the 11th day in space for the four crew members of the STS-135 Atlantis mission. Photo credit: NASA

JSC2011-E-028122 (23 March 2011) --- NASA astronauts Doug Hurley, STS-135 pilot; and Sandy Magnus (foreground), mission specialist, participate in an exercise in the systems engineering simulator in the Avionics Systems Laboratory at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-060445 (30 June 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, responds to a question from a reporter during a preflight press conference at NASA's Johnson Space Center. Photo credit: NASA

S135-E-008963 (17 July 2011) --- With transfer chores wrapped up, NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured on the middeck of Atlantis less than 24 hours before the shuttle was scheduled to undock from the International Space Station. Photo credit: NASA

JSC2011-E-043696 (29 April 2011) --- NASA astronauts Rex Walheim (center) and Sandy Magnus, both STS-135 mission specialists, participate in an ingress/egress timeline training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA

JSC2011-E-060425 (30 June 2011) --- The STS-135 crew members are pictured during a preflight press conference at NASA's Johnson Space Center. From the left are NASA astronauts Chris Ferguson, commander; Doug Hurley, pilot; Sandy Magnus and Rex Walheim, both mission specialists. Photo credit: NASA

JSC2011-E-060746 (29 June 2011) --- NASA astronauts Doug Hurley (left), STS-135 pilot; Rex Walheim and Sandy Magnus, both mission specialists, are pictured during a training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA

S135-E-006384 (9 July 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured on the flight deck of the space shuttle Atlantis during the flight's second day of activities in Earth orbit. Photo credit: NASA

NASA astronaut Sandy Magnus is helped out of her training EMU after training for spacewalk in the Neutral Buoyancy Laboratory (NBL) on Tuesday, March 22, 2011, in Houston. In the background, a test is performed on the Orion capsule. ( NASA Photo / Houston Chronicle, Smiley N. Pool )

JSC2011-E-070500 (22 July 2011) --- NASA astronauts Sandy Magnus and Rex Walheim, both STS-135 mission specialists, are pictured during the STS-135 crew return ceremony on July 22, 2011 at Ellington Field near NASA?s Johnson Space Center. Photo credit: NASA

JSC2011-E-021695 (25 Feb. 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, participates in a training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration

S135-E-007696 (13 July 2011) --- On Atlantis' middeck, NASA astronauts Rex Walheim and Sandy Magnus, STS-135 mission specialists, discuss the large tasks of moving supplies on the joint shuttle/International Space Station complex during the sixth day in space for the four shuttle crewmembers. Photo credit: NASA

S135-E-007118 (10 July 2011) ? NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured at controls on the flight deck of the space shuttle Atlantis during rendezvous and docking operations with the International Space Station. NASA astronaut Rex Walheim, mission specialist, is at right. Photo credit: NASA

S135-E-008122 (14 July 2011) --- NASA astronaut Chris Ferguson, STS-135 commander, returns a small tool to a tray on the middeck of the space shuttle Atlantis while the spacecraft was docked with the International Space Station. Crewmate Sandy Magnus, mission specialist, is in the background. Photo credit: NASA

S135-E-006388 (9 July 2011) --- NASA astronauts Chris Ferguson, STS-135 commander, and Sandy Magnus, mission specialist, are pictured on the aft flight deck of the space shuttle Atlantis during the mission's second day of activities in Earth orbit. Photo credit: NASA

S135-E-006328 (9 July 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured on the middeck of the space shuttle Atlantis during a brief break in the flight's second day of activities in Earth orbit. Photo credit: NASA

S135-E-008901 (17 July 2011) --- With transfer chores wrapped up, NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured on the middeck of Atlantis less than 24 hours before the shuttle was scheduled to undock from the International Space Station. Photo credit: NASA

JSC2011-E-070464 (22 July 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured during the STS-135 crew return ceremony on July 22, 2011 at Ellington Field near NASA?s Johnson Space Center. Photo credit: NASA

JSC2011-E-050025 (24 May 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, attired in a training version of the shuttle launch and entry suit, is pictured during an ingress/egress training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA

JSC2011-E-060459 (30 June 2011) --- STS-135 crew members are pictured following a preflight press conference at NASA's Johnson Space Center. From the right are NASA astronauts Chris Ferguson, commander; Sandy Magnus and Rex Walheim, both mission specialists; and Doug Hurley, pilot. Photo credit: NASA

JSC2010-E-181483 (27 Oct. 2010) --- Attired in a training version of his Extravehicular Mobility Unit (EMU) spacesuit, NASA astronaut Rex Walheim, STS-135 mission specialist, participates in a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Divers are in the water to assist Walheim in his rehearsal, which is intended to help prepare him for work on the exterior of the International Space Station. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2010-E-181447 (27 Oct. 2010) --- NASA astronaut Rex Walheim, STS-135 mission specialist, gets help donning a training version of his Extravehicular Mobility Unit (EMU) spacesuit in preparation for a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2010-E-181439 (27 Oct. 2010) --- NASA astronaut Rex Walheim, STS-135 mission specialist, dons a training version of his Extravehicular Mobility Unit (EMU) spacesuit in preparation for a spacewalk training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2010-E-181470 (27 Oct. 2010) --- Attired in a training version of his Extravehicular Mobility Unit (EMU) spacesuit, NASA astronaut Rex Walheim, STS-135 mission specialist, is about to be submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Divers (out of frame) are in the water to assist Walheim in his rehearsal, which is intended to help prepare him for work on the exterior of the International Space Station. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-024075 (4 March 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. NASA astronaut Chris Ferguson (right), STS-135 commander; and Japan Aerospace Exploration Agency (JAXA) astronaut Satoshi Furukawa, Expedition 28/29 flight engineer, assisted Magnus. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-024064 (4 March 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, prepares for an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. NASA astronaut Chris Ferguson (right), STS-135 commander; and Japan Aerospace Exploration Agency (JAXA) astronaut Satoshi Furukawa, Expedition 28/29 flight engineer, assisted Magnus. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-024066 (4 March 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, prepares for an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. NASA astronaut Chris Ferguson (right), STS-135 commander; and Japan Aerospace Exploration Agency (JAXA) astronaut Satoshi Furukawa, Expedition 28/29 flight engineer, assisted Magnus. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-024070 (4 March 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. NASA astronaut Chris Ferguson (right), STS-135 commander; and Japan Aerospace Exploration Agency (JAXA) astronaut Satoshi Furukawa, Expedition 28/29 flight engineer, assisted Magnus. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-024067 (4 March 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, prepares for an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. NASA astronaut Chris Ferguson (right), STS-135 commander; and Japan Aerospace Exploration Agency (JAXA) astronaut Satoshi Furukawa, Expedition 28/29 flight engineer, assisted Magnus. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-040270 (24 March 2011) --- NASA astronaut Chris Ferguson, left, STS-135 commander, dons his training version of a shuttle launch and entry suit before participating in a post-insertion training session with NASA astronauts Doug Hurley, pilot, and Sandy Magnus, mission specialist, March 24, 2011, in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center in Houston. Hurley and Magnus are wearing their liquid-cooled undergarments for the orange suit. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool

JSC2011-E-024083 (4 March 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. NASA astronaut Chris Ferguson (right), STS-135 commander; and Japan Aerospace Exploration Agency (JAXA) astronaut Satoshi Furukawa, Expedition 28/29 flight engineer, assisted Magnus. Photo credit: NASA or National Aeronautics and Space Administration

JSC2010-E-193961 (2 Dec. 2010) --- NASA astronauts Doug Hurley, STS-135 pilot; and Sandy Magnus, mission specialist, participate in a training session in the fixed-base shuttle mission simulator (SMS) in the Jake Garn Simulation and Training Facility at NASA's Johnson Space Center. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

S135-E-007107 (10 July 2011) --- NASA astronaut Sandy Magnus, STS-135 mission specialist, is pictured with only a small portion of supplies and equipment on the middeck of the space shuttle Atlantis during the very busy third day in space as the four astronauts prepare to join a six-person crew aboard the International Space Station. Photo credit: NASA

JSC2010-E-196891 (20 Dec. 2010) --- NASA astronauts Rex Walheim and Sandy Magnus (mostly obscured), both STS-135 mission specialists, attired in training versions of their shuttle launch and entry suits, participate in a post insertion/de-orbit training session on the flight deck of the crew compartment trainer (CCT-2) in the Space Vehicle Mockup Facility at NASA's Johnson Space Center. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-067642 (8 July 2011) --- The space shuttle Atlantis launches for the STS-135 mission to the International Space Station in the final mission of the Space Shuttle Program at NASA?s Kennedy Space Center in Florida. Liftoff was at 11:29 a.m. (EDT) on July 8, 2011. Onboard are NASA astronauts Chris Ferguson, STS-135 commander; Doug Hurley, pilot; Sandy Magnus and Rex Walheim, both mission specialists. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool

JSC2011-E-021706 (25 Feb. 2011) --- NASA astronaut Chris Ferguson, STS-135 commander; and Sandy Magnus, mission specialist, use computers during a training session in a space station mock-up in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-067588 (8 July 2011) --- The space shuttle Atlantis launches for the STS-135 mission to the International Space Station in the final mission of the Space Shuttle Program at NASA?s Kennedy Space Center in Florida. Liftoff was at 11:29 a.m. (EDT) on July 8, 2011. Onboard are NASA astronauts Chris Ferguson, STS-135 commander; Doug Hurley, pilot; Sandy Magnus and Rex Walheim, both mission specialists. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool

JSC2010-E-195550 (3 Dec. 2010) --- Attired in training versions of their shuttle launch and entry suits, STS-135 crew members await the start of a training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Pictured from the left are NASA astronauts Rex Walheim, Sandy Magnus, both mission specialists; Chris Ferguson, commander; and Doug Hurley, pilot. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-028482 (24 March 2011) --- NASA astronauts Rex Walheim and Sandy Magnus, both STS-135 mission specialists, attired in training versions of their shuttle launch and entry suits, participate in a training session in the Full Fuselage Trainer (FFT) in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-070270 (22 July 2011) --- NASA's Johnson Space Center (JSC) director Michael L. Coats (left) and STS-135 crew members are pictured during the STS-135 crew return ceremony on July 22, 2011 at Ellington Field near JSC. Pictured from second left are NASA astronauts Chris Ferguson, commander; Doug Hurley, pilot; Sandy Magnus and Rex Walheim, both mission specialists. Photo credit: NASA

JSC2011-E-067643 (8 July 2011) --- The space shuttle Atlantis launches for the STS-135 mission to the International Space Station in the final mission of the Space Shuttle Program at NASA?s Kennedy Space Center in Florida. Liftoff was at 11:29 a.m. (EDT) on July 8, 2011. Onboard are NASA astronauts Chris Ferguson, STS-135 commander; Doug Hurley, pilot; Sandy Magnus and Rex Walheim, both mission specialists. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool

JSC2011-E-028134 (23 March 2011) --- NASA astronauts Chris Ferguson (left), STS-135 commander; Doug Hurley (right), pilot; and Sandy Magnus, mission specialist, participate in an exercise in the systems engineering simulator in the Avionics Systems Laboratory at NASA's Johnson Space Center. The facility includes moving scenes of full-sized International Space Station components over a simulated Earth. Photo credit: NASA or National Aeronautics and Space Administration

JSC2011-E-067589 (8 July 2011) --- The space shuttle Atlantis launches for the STS-135 mission to the International Space Station in the final mission of the Space Shuttle Program at NASA?s Kennedy Space Center in Florida. Liftoff was at 11:29 a.m. (EDT) on July 8, 2011. Onboard are NASA astronauts Chris Ferguson, STS-135 commander; Doug Hurley, pilot; Sandy Magnus and Rex Walheim, both mission specialists. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool