NASA astronaut Mike Fincke replaces thermal tape on a spacesuit camera

NASA astronaut Jonny Kim reviews Cygnus XL procedures on a computer tablet

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NASA astronaut gives a “thumbs up” while holding a spacesuit camera

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NASA astronaut Mike Fincke shows off the Voyager Flytrap technology demonstration

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NASA astronaut Mike Fincke displays protein crystal research hardware

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Astronaut Suni Williams monitors an Astrobee robotic free-flyer

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Astronaut Scott Carpenter in Hangar S crew quarters during suiting activity

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View of STS-121 Astronauts shadows during EVA 1

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Astronaut Suni Williams displays production packs containing geneticallly engineered yeast

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NASA Astronaut Loral O'Hara Holds Robotic Surgery Device

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Astronaut Suni Williams installs the European Materials Ageing experiment

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Expedition 71 Astronauts Speak with U.S. Senate Youth Program

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NASA astronaut Jonny Kim swaps physical science and crystalization research hardware

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Astronauts Anne McClain and Nichole Ayers checkout spacesuit hardware in the Quest airlock

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NASA astronaut Kjell Lindgren visits DuVal High School

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SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim

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Astronauts Butch Wilmore and Don Pettit install futuristic exercise gear

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Astronauts Engle and Truly in cockpit of Orbiter 101 prior to takeoff

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SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim

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Astronauts Walz, Scott, Clifford and Cheli during WETF training

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GORDON, RICHARD F., ASTRONAUT - MISC. - GEMINI-TITAN (GT)-11 - CAPE

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SSATA Crew Training and EMU Verification for STS-135 astronaut Rex Walheim

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Astronauts Brian Duffy and Dan Barry team up to prepare a meal

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Astronaut Michael Lopez-Alegria in T-38 aircraft cockpit

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Astronauts Jonny Kim and Takuya Onishi set up a pair of spacesuits

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