ISS043E087403 (04/06/2015) --- NASA astronauts Terry Virts (left) and Scott Kelly are seen here inside the station’s Quest airlock. The pair were performing routine maintenance activities on two of the International Space Station’s Extravehicular Mobility Units (EMU,) or spacesuits, seen in the background.

Dark view of two Extravehicular Mobility Units (EMUs) located in the Quest airlock. Photo taken by the Expedition 40 crew.

View of a pair of Extravehicular Mobility Units (EMUs) and assorted other bags in the Quest Airlock as documented by the Expedition 36 crew.

View of an Extravehicular Mobility Unit (EMU) stowed in the Quest airlock as seen by the Expedition 40 crew.

ISS040-E-080780 (28 July 2014) --- Photographed by an Expedition 40 crew member, an empty Extravehicular Mobility Unit (EMU) spacesuit is pictured near the gallery in the Unity node of the International Space Station.

View of stowed Extravehicular Mobility Units (EMUs),in the Airlock (A/L). Photo was taken during Expedition 34.

View of Extravehicular Mobility Unit (EMU) with geocaching travel bug,in the airlock (A/L). Photo was taken during Expedition 38. Image was released by astronaut on Twitter.

S128-E-006866 (30 Aug. 2009) --- Astronaut Nicole Stott, STS-128 mission specialist, works with an Extravehicular Mobility Unit (EMU) spacesuit on the middeck of the Space Shuttle Discovery during flight day three activities.

ISS026-E-025413 (9 Feb. 2011) --- NASA astronaut Catherine (Cady) Coleman, Expedition 26 flight engineer, works with Extravehicular Mobility Unit (EMU) spacesuit equipment in the Quest airlock of the International Space Station.

ISS036-E-038556 (30 Aug. 2013) --- NASA astronaut Chris Cassidy, Expedition 36 flight engineer, works on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

ISS040-E-086597 (1 Aug. 2014) --- Two unoccupied Extravehicular Mobility Unit (EMU) spacesuits, photographed by an Expedition 40 crew member, appear to hold stowage containers in the Quest airlock of the International Space Station.

ISS038-E-004128 (18 Nov. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, participates in Extravehicular Mobility Unit (EMU) spacesuit tests and repairs in the Quest airlock of the International Space Station.

ISS041-E-011851 (15 Sept. 2014) --- An unoccupied Extravehicular Mobility Unit (EMU) spacesuit, photographed by an Expedition 41 crew member, floats freely near the hatches inside the Harmony node of the International Space Station.

ISS040-E-086600 (1 Aug. 2014) --- Two unoccupied Extravehicular Mobility Unit (EMU) spacesuits, photographed by an Expedition 40 crew member, appear to hold stowage containers in the Quest airlock of the International Space Station.

ISS026-E-025406 (9 Feb. 2011) --- NASA astronaut Catherine (Cady) Coleman, Expedition 26 flight engineer, works with Extravehicular Mobility Unit (EMU) spacesuit equipment in the Quest airlock of the International Space Station.

ISS036-E-038552 (30 Aug. 2013) --- NASA astronaut Chris Cassidy, Expedition 36 flight engineer, works on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

ISS036-E-038678 (31 Aug. 2013) --- NASA astronaut Chris Cassidy, Expedition 36 flight engineer, works on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

ISS026-E-025411 (9 Feb. 2011) --- NASA astronaut Catherine (Cady) Coleman, Expedition 26 flight engineer, works with Extravehicular Mobility Unit (EMU) spacesuit equipment in the Quest airlock of the International Space Station.

STS109-E-5010 (3 March 2002) --- On the mid deck of the Space Shuttle Columbia, the extravehicular mobility unit (EMU) space suit for astronaut Michael J. Massimino, mission specialist, appears ready for duty. The suit will be initially called on for support on the second day of extravehicular activity (EVA), as the second pair of STS-109 space walking astronauts gets into the act of working on the Hubble Space Telescope. The image was recorded with a digital still camera.

ISS014-E-09442 (12 Dec. 2006) --- Astronaut Robert L. Curbeam, Jr., STS-116 mission specialist, floats with his Extravehicular Mobility Unit (EMU) spacesuit in the Destiny laboratory of the International Space Station as he prepares for the mission's first scheduled session of extravehicular activity (EVA).

ISS040-E-080769 (28 July 2014) --- NASA astronauts Steve Swanson (left), Expedition 40 commander, and Reid Wiseman, flight engineer, work in tandem to perform in-flight maintenance on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

ISS040-E-080762 (28 July 2014) --- NASA astronauts Steve Swanson (left), Expedition 40 commander, and Reid Wiseman, flight engineer, work with an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

S128-E-006865 (30 Aug. 2009) --- Astronaut Nicole Stott, STS-128 mission specialist, poses for a photo with an Extravehicular Mobility Unit (EMU) spacesuit on the middeck of the Space Shuttle Discovery during flight day three activities.

S114-E-7123 (5 August 2005) --- Astronaut Stephen K. Robinson, STS-114 mission specialist, holds Extravehicular Mobility Unit (EMU) spacesuit gloves as he floats through a hatch while Space Shuttle Discovery was docked to the International Space Station.

ISS040-E-080767 (28 July 2014) --- NASA astronauts Steve Swanson (left), Expedition 40 commander, and Reid Wiseman, flight engineer, work in tandem to perform in-flight maintenance on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

S128-E-006864 (30 Aug. 2009) --- European Space Agency astronaut Christer Fuglesang, STS-128 mission specialist, poses for a photo with an Extravehicular Mobility Unit (EMU) spacesuit on the middeck of the Space Shuttle Discovery during flight day three activities.

S131-E-008597 (10 April 2010) --- NASA astronaut Rick Mastracchio, STS-131 mission specialist, poses for a photo with the torso portion of his Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station while space shuttle Discovery remains docked with the station.

ISS014-E-09440 (12 Dec. 2006) --- European Space Agency (ESA) astronaut Christer Fuglesang, STS-116 mission specialist, floats with his Extravehicular Mobility Unit (EMU) spacesuit in the Destiny laboratory of the International Space Station as he prepares for the mission's first scheduled session of extravehicular activity (EVA).

ISS019-E-021330 (28 May 2009) --- Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata, Expedition 19/20 flight engineer, poses for a photo with an Extravehicular Mobility Unit (EMU) spacesuit in the Kibo laboratory of the International Space Station.

S128-E-006863 (30 Aug. 2009) --- Astronaut John “Danny” Olivas, STS-128 mission specialist, poses for a photo with an Extravehicular Mobility Unit (EMU) spacesuit on the middeck of the Space Shuttle Discovery during flight day three activities.

S128-E-006869 (30 Aug. 2009) --- European Space Agency astronaut Christer Fuglesang, STS-128 mission specialist, works with an Extravehicular Mobility Unit (EMU) spacesuit water bag on the middeck of Space Shuttle Discovery during flight day three activities.

JAXA Astronaut Aki Hoshide get’s suited up for his EMU space suit portrait session. Hoshide is part of the Expedition 64/65 Mission crew and commander of the ISS for Expedition 65. He flew to station as part of Crew-2 aboard the Space-X Crew Dragon vehicle.

ISS036-E-027923 (2 Aug. 2013) --- NASA astronaut Chris Cassidy, Expedition 36 flight engineer, works with an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

ISS036-E-027931 (2 Aug. 2013) --- NASA astronaut Chris Cassidy, Expedition 36 flight engineer, uses a computer while working with Extravehicular Mobility Unit (EMU) spacesuits in the Quest airlock of the International Space Station.

ISS036-E-027932 (2 Aug. 2013) --- NASA astronaut Chris Cassidy, Expedition 36 flight engineer, works with an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

Photo Date: July 29, 2009 / Location: Building 8 Room 272 - Photo Studio / Subject: Catherine Coleman Official Individual EMU Astronaut Portrait / Photographer: Robert Markowitz

Side close-up view of crewman in high-fidelity Extravehicular Mobility Unit (EMU) / Manned Maneuvering Unit (MMU) mockup.

Portrait view of astronaut Jack Lousma in the Extravehicular Mobility Unit (EMU) at bldg 29 Weightless Environment Training Facility (WETF). He is wearing the EMU minus the helmet.

ISS024-E-011561 (7 Aug. 2010) --- NASA astronaut Tracy Caldwell Dyson, Expedition 24 flight engineer, dons her Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station in preparation for the first of three planned spacewalks to remove and replace an ammonia pump module that failed July 31.

ISS014-E-13499 (7 Feb. 2007) --- Astronaut Sunita L. Williams, Expedition 14 flight engineer, works with the helmet of her Extravehicular Mobility Unit (EMU) spacesuit in the Quest Airlock of the International Space Station as she prepares for the final of three sessions of extravehicular activity (EVA) in nine days, scheduled for Feb. 8.

ISS047e048133 (04/01/2016) --- NASA astronaut Tim Kopra prepares a U.S. Extravehicular Mobility Unit (EMU) spacesuit for cooling loop maintenance. Spacesuits on-board the International Space Station get routine maintenance between spacewalks.

Expedition 39 flight engineer Rick Mastracchio poses for a photo with the replacement Fan Pump Separator (FPS) and Extravehicular Mobility Unit (EMU) 3005. Image was taken in the Quest Airlock (A/L) during FPS remove and replace operations.

ISS030-E-148280 (13 March 2012) --- NASA astronaut Dan Burbank, Expedition 30 commander, performs routine in-flight maintenance on Extravehicular Mobility Unit (EMU) equipment in the Quest airlock of the International Space Station.

S82-E-5033 (12 Feb. 1997) --- Two Extravehicular Mobility Units (EMU), unoccupied and partially pressurized, in the Space Shuttle Discovery's airlock. This view was taken with an Electronic Still Camera (ESC).

Extravehicular crewmember 1 (EV1) Jeff Williams' camera view of the American flag on his Extravehicular Mobility Unit (EMU). Image was taken during Extravehicular Activity 37 (EVA 37).

ISS030-E-148275 (13 March 2012) --- NASA astronaut Dan Burbank, Expedition 30 commander, performs routine in-flight maintenance on Extravehicular Mobility Unit (EMU) equipment in the Quest airlock of the International Space Station.

Expedition 42/43 ESA astronaut Samantha Cristoforetti during preparations for EMU Certification Altitude Run. Photo Date: September 22, 2014. Location: Bldg. 7, 11 foot chamber. Photographer: Robert Markowitz

ISS040-E-007340 (4 June 2014) --- NASA astronaut Steve Swanson, Expedition 40 commander, works with an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

Expedition 42/43 ESA astronaut Samantha Cristoforetti during preparations for EMU Certification Altitude Run. Photo Date: September 22, 2014. Location: Bldg. 7, 11 foot chamber. Photographer: Robert Markowitz

ISS040-E-010971 (12 June 2014) --- European Space Agency astronaut Alexander Gerst, Expedition 40 flight engineer, performs a checkout on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

Expedition 42/43 ESA astronaut Samantha Cristoforetti during preparations for EMU Certification Altitude Run. Photo Date: September 22, 2014. Location: Bldg. 7, 11 foot chamber. Photographer: Robert Markowitz

ISS030-E-148276 (13 March 2012) --- NASA astronaut Dan Burbank, Expedition 30 commander, performs routine in-flight maintenance on Extravehicular Mobility Unit (EMU) equipment in the Quest airlock of the International Space Station.

Expedition 42/43 ESA astronaut Samantha Cristoforetti during preparations for EMU Certification Altitude Run. Photo Date: September 22, 2014. Location: Bldg. 7, 11 foot chamber. Photographer: Robert Markowitz

Expedition 42/43 ESA astronaut Samantha Cristoforetti during preparations for EMU Certification Altitude Run. Photo Date: September 22, 2014. Location: Bldg. 7, 11 foot chamber. Photographer: Robert Markowitz

STS098-361-016 (7-20 February 2001) --- Astronaut Mark L. Polansky, STS-98 pilot, moves one of the Extravehicular Mobility Unit (EMU) space suits in its storage bag onboard the International Space Station (ISS). William M. (Bill) Shepherd, Expedition One mission commander, can be seen as he works in the background.

S128-E-007468 (2 Sept. 2009) --- NASA astronauts Rick Sturckow (left) and Jose Hernandez, STS-128 commander and mission specialist, respectively, pose for a photo with an Extravehicular Mobility Unit (EMU) spacesuit in the Leonardo Multi-Purpose Logistics Module (MPLM), temporarily attached to the International Space Station while Space Shuttle Discovery remains docked with the station.

ISS026-E-031000 (28 Feb. 2011) --- Attired in his Extravehicular Mobility Unit (EMU) spacesuit, NASA astronaut Alvin Drew, STS-133 mission specialist, enters the International Space Station?s Quest airlock as the mission?s first spacewalk draws to a close. NASA astronaut Michael Barratt, mission specialist, assisted Drew. Photo credit: NASA or National Aeronautics and Space Administration

TS102-E-5054 (10 March 2001) --- Astronaut Susan J. Helms, STS-102 mission specialist, is pictured on the mid deck with both Extravehicular Mobility Unit (EMU) space suits designated for extravehicular activity (EVA). Helms is one of two astronauts assigned to space walk duties after the Space Shuttle Discovery and the International Space Station (ISS) link in Earth orbit. The photograph was recorded with a digital still camera.

STS102-E-5152 (13 March 2001) --- Cosmonaut Yuri P. Gidzenko, now a member of the STS-102 crew, on Discovery's mid deck with extravehicular mobility unit (EMU) space suits. Gidzenko, representing Rosaviakosmos, had been onboard the International Space Station (ISS) since early November 2000. The photograph was taken with a digital still camera.

S114-E-6017 (1 August 2005) --- Astronaut Stephen K. Robinson, STS-114 mission specialist, dons his Extravehicular Mobility Unit (EMU) space suit on the middeck of the Space Shuttle Discovery, as he prepares for the scheduled seven-hour space walk with fellow STS-114 mission specialist, astronaut Soichi Noguchi (out of frame) representing Japan Aerospace Exploration Agency (JAXA).

ISS007-E-05859 (28 May 2003) --- Cosmonaut Yuri I. Malenchenko, Expedition Seven mission commander, works with Extravehicular Mobility Unit (EMU) spacesuits in the Quest airlock on the International Space Station (ISS). Today Malenchenko and astronaut Edward T. Lu (out of frame), NASA ISS science officer and flight engineer, performed an EMU spacesuit fit check and don/doff dry-run. The objective was to check out the equipment and provide the crew with training for preparing for a two-person spacewalk without intravehicular (IV) crewmember support, should it become necessary. Malenchenko represents Rosaviakosmos.

S82-27594 (25 Feb 1982) --- Astronaut Bruce McCandless II models NASA?s extravehicular mobility unit (EMU) spacesuit for Shuttle and the backpack unit (called a manned maneuvering unit) that will give future STS crewmembers extended mobility in space. A forerunner version of the MMU?called an astronaut maneuvering unit?was tested internally on Skylab. The MMU will allow astronauts for the first time in history to move about in the vicinity of their spacecraft without being tethered to the ship. McCandless was giving a demonstration of the EMU/MMU in JSC?s laboratory support facility.

KENNEDY SPACE CENTER, FLA. -- A worker on Launch Pad 39B arrives on the 195-foot level of the fixed service structure with a cart containing the extravehicular mobility units (or spacewalk suits) to be used on mission STS-116. The suits will be stored inside Space Shuttle Discovery. Launch of Discovery is scheduled for 9:35 p.m. Dec. 7. The crew will deliver the P5 integrated truss to the International Space Station and install it during one or more extravehicular activities. Photo credit: NASA/Jack Pfaller

KENNEDY SPACE CENTER, FLA. -- Inside the White Room on Launch Pad 39B, the worker in the foreground hands off the cart to another worker in a protective suit who will move it inside Space Shuttle Discovery for storage. The cart contains the extravehicular mobility units (or spacewalk suits) to be used on mission STS-116. Launch of Discovery is scheduled for 9:35 p.m. Dec. 7. The crew will deliver the P5 integrated truss to the International Space Station and install it during one or more extravehicular activities. Photo credit: NASA/Jack Pfaller

KENNEDY SPACE CENTER, FLA. -- Inside the White Room on Launch Pad 39B, workers get ready to move a cart through the hatch into Space Shuttle Discovery. The cart contains the extravehicular mobility units (or spacewalk suits) to be used on mission STS-116. The suits will be stored inside Discovery. Launch of Discovery is scheduled for 9:35 p.m. Dec. 7. The crew will deliver the P5 integrated truss to the International Space Station and install it during one or more extravehicular activities. Photo credit: NASA/Jack Pfaller

KENNEDY SPACE CENTER, FLA. -- Two workers on Launch Pad 39B maneuver a cart along the orbiter access arm toward the White Room. The cart contains the extravehicular mobility units (or spacewalk suits) to be used on mission STS-116. The suits will be stored inside Space Shuttle Discovery, which has access from the White Room. Launch of Discovery is scheduled for 9:35 p.m. Dec. 7. The crew will deliver the P5 integrated truss to the International Space Station and install it during one or more extravehicular activities. Photo credit: NASA/Jack Pfaller

ISS012-E-05983 (23 Oct. 2005) --- Astronaut William S. McArthur Jr. (right), Expedition 12 commander and NASA science officer, dons his Extravehicular Mobility Unit (EMU) spacesuit in the Quest Airlock of the international space station. Cosmonaut Valery I. Tokarev, flight engineer representing Russia's Federal Space Agency, assisted McArthur. When the Expedition 12 crew performs its first scheduled day of spacewalking on Nov. 7, it will be attired in the NASA EMU.

ISS012-E-06011 (23 Oct. 2005) --- Cosmonaut Valery I. Tokarev (left), Expedition 12 flight engineer representing Russia's Federal Space Agency, dons his Extravehicular Mobility Unit (EMU) spacesuit in the Quest Airlock of the international space station. Astronaut William S. McArthur Jr., commander and NASA science officer, assisted Tokarev. When the Expedition 12 crew performs its first scheduled day of spacewalking on Nov. 7, it will be attired in the NASA EMU.

ISS012-E-06020 (26 October 2005) --- Astronaut William S. McArthur Jr., Expedition 12 commander and NASA science officer, works with Extravehicular Mobility Unit (EMU) spacesuits in the Quest airlock of the international space station. When the Expedition 12 crew performs its first scheduled day of spacewalking on Nov. 7, it will be attired in the NASA EMU.

ISS012-E-06022 (26 Oct. 2005) --- Astronaut William S. McArthur Jr., Expedition 12 commander and NASA science officer, works with Extravehicular Mobility Unit (EMU) spacesuits in the Quest airlock of the international space station. When the Expedition 12 crew performs its first scheduled day of spacewalking on Nov. 7, it will be attired in the NASA EMU.

ISS012-E-06006 (23 October 2005) --- Cosmonaut Valery I. Tokarev (left), Expedition 12 flight engineer representing Russia's Federal Space Agency, dons his Extravehicular Mobility Unit (EMU) spacesuit in the Quest Airlock of the international space station. Astronaut William S. McArthur Jr., commander and NASA science officer, assisted Tokarev. When the Expedition 12 crew performs its first scheduled day of spacewalking on Nov. 7, it will be attired in the NASA EMU.

ISS012-E-06012 (23 October 2005) --- Cosmonaut Valery I. Tokarev (left), Expedition 12 flight engineer representing Russia's Federal Space Agency, dons his Extravehicular Mobility Unit (EMU) spacesuit in the Quest Airlock of the international space station. Astronaut William S. McArthur Jr., commander and NASA science officer, assisted Tokarev. When the Expedition 12 crew performs its first scheduled day of spacewalking on Nov. 7, it will be attired in the NASA EMU.

ISS035-E-030111 (28 April 2013) --- This high-angle view in the Quest airlock aboard the Earth-orbiting International Space Station portends a spacewalk for the Expedition 36 crew later in the year. Two extravehicular mobility units (EMU) stand ready for the event. U.S. and Italian flags on the shoulders of the suits signal that the participating astronauts would be representing NASA and the European Space Agency (ESA). Actually, NASA astronaut Chris Cassidy, now serving as a member of the Expedition 35 crew; and Luca Parmitano of ESA, who is currently still on Earth getting ready for a May launch, are scheduled for two spacewalks together in the summer of this year.

iss060e038558 (8/21/2019) --- A view of Extravehicular Mobility Units (EMUs) in the Quest Airlock (A/L) aboard the International Space Station (ISS). The Quest Airlock is a pressurized space station module consisting of two compartments attached end-to-end by a connecting bulkhead and hatch. The two compartments are the Equipment Lock which provides the systems for suit maintenance and refurbishment and the Crew Lock which provides the actual exit for performing spacewalks. The airlock is the primary path for spacewalk entry and departure for astronauts wearing U.S. spacesuits. Quest can also support the Russian Orlan spacesuit for spacewalks.

ISS029-E-011030 (26 Sept. 2011) --- Japan Aerospace Exploration Agency astronaut Satoshi Furukawa, Expedition 29 flight engineer, performs protective maintenance on Extravehicular Mobility Unit (EMU) spacesuits in the Quest airlock of the International Space Station.

S117-E-07165 (13 June 2007) --- Attired in his extravehicular mobility unit (EMU) spacesuit, astronaut Steven Swanson, STS-117 mission specialist, prepares for the mission's second session of extravehicular activity (EVA) in the Quest Airlock of the International Space Station while Space Shuttle Atlantis was docked with the station.

ISS039-E-011886 (14 April 2014) --- In the Quest airlock of the International Space Station, Expedition 39 Flight Engineer Steve Swanson of NASA works on one of the Extravehicular Mobility Unit (EMU) spacesuits to be used on an upcoming spacewalk on which Swanson and crewmate Rick Mastracchio of NASA will participate.

ISS007-E-14474 (5 September 2003) --- Astronaut Edward T. Lu, Expedition 7 NASA ISS science officer and flight engineer, floats near the torso portions of the Extravehicular Mobility Unit (EMU) space suits stored in the Quest airlock on the International Space Station (ISS).

S128-E-007138 (31 Aug. 2009) --- Astronaut John “Danny” Olivas, STS-128 mission specialist, works near an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station while Space Shuttle Discovery remains docked with the station.

S131-E-008661 (11 April 2010) --- NASA astronaut Rick Mastracchio, STS-131 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, is pictured in the Quest airlock of the International Space Station prior to the start of the mission's second spacewalk.

ISS007-E-14475 (5 September 2003) --- Cosmonaut Yuri I. Malenchenko, Expedition 7 mission commander, works with a torso portion of an Extravehicular Mobility Unit (EMU) space suit stored in the Quest airlock on the International Space Station (ISS). Malenchenko represents Rosaviakosmos.

S131-E-008672 (11 April 2010) --- NASA astronauts Rick Mastracchio (left) and Clayton Anderson, both STS-131 mission specialists, attired in their Extravehicular Mobility Unit (EMU) spacesuits, prepare to exit the Quest airlock of the International Space Station to begin the mission's second spacewalk.

ISS040-E-010979 (12 June 2014) --- European Space Agency astronaut Alexander Gerst, Expedition 40 flight engineer, uses a computer while working on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

ISS040-E-010972 (12 June 2014) --- European Space Agency astronaut Alexander Gerst, Expedition 40 flight engineer, uses a computer while working on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

ISS030-E-148284 (13 March 2012) --- European Space Agency astronaut Andre Kuipers, Expedition 30 flight engineer, performs routine in-flight maintenance on Extravehicular Mobility Unit (EMU) equipment in the Quest airlock of the International Space Station.

ISS007-E-12318 (7 August 2003) --- Astronaut Edward T. Lu, Expedition 7 NASA ISS science officer and flight engineer, is pictured wearing an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock on the International Space Station (ISS).

JSC2016e026853 (06/13/2016) --- Official portrait of Expedition 50 ESA (European Space Agency) astronaut Thomas Pesquet in a spacesuit (EMU) suit. PHOTOGRAPHER: BILL STAFFORD

ISS024-E-011634 (7 Aug. 2010) --- Attired in her Extravehicular Mobility Unit (EMU) spacesuit, NASA astronaut Tracy Caldwell Dyson, Expedition 24 flight engineer, is pictured in the Quest airlock of the International Space Station as the first of three planned spacewalks to remove and replace an ammonia pump module that failed July 31 draws to a close.

STS102-E-5061 (10 March 2001) --- Astronauts James S. Voss and Susan J. Helms, STS-102 mission specialists, are pictured with their Extravehicular Mobility Unit (EMU) space suits on the mid deck. The two astronauts are assigned to space walk duties after the Space Shuttle Discovery and the International Space Station (ISS) link in Earth orbit. The photograph was recorded with a digital still camera.

ISS024-E-011673 (11 Aug. 2010) --- NASA astronaut Tracy Caldwell Dyson, Expedition 24 flight engineer, attired in her Extravehicular Mobility Unit (EMU) spacesuit, is pictured in the Quest airlock of the International Space Station as the second of three planned spacewalks to remove and replace an ammonia pump module that failed July 31 draws to a close. NASA astronaut Shannon Walker and Russian cosmonaut Fyodor Yurchikhin, both flight engineers, assist Caldwell Dyson with the doffing of her spacesuit.

ISS024-E-011584 (7 Aug. 2010) --- NASA astronaut Doug Wheelock, Expedition 24 flight engineer, attired in his Extravehicular Mobility Unit (EMU) spacesuit, is pictured in the Quest airlock of the International Space Station prior to the start of the first of three planned spacewalks to remove and replace an ammonia pump module that failed July 31.

ISS024-E-011678 (11 Aug. 2010) --- NASA astronaut Doug Wheelock, Expedition 24 flight engineer, attired in his Extravehicular Mobility Unit (EMU) spacesuit, is pictured in the Quest airlock of the International Space Station as the second of three planned spacewalks to remove and replace an ammonia pump module that failed July 31 draws to a close.

ISS024-E-011537 (7 Aug. 2010) --- NASA astronaut Doug Wheelock (right), attired in his Extravehicular Mobility Unit (EMU) spacesuit, and Russian cosmonaut Fyodor Yurchikhin, both Expedition 24 flight engineers, pose for a photo in the Quest airlock of the International Space Station during preparations for the first of three planned spacewalks to remove and replace an ammonia pump module that failed July 31.

ISS024-E-011676 (11 Aug. 2010) --- NASA astronaut Doug Wheelock, Expedition 24 flight engineer, attired in his Extravehicular Mobility Unit (EMU) spacesuit, is pictured in the Quest airlock of the International Space Station as the second of three planned spacewalks to remove and replace an ammonia pump module that failed July 31 draws to a close.

STS102-E-5057 (10 March 2001) --- Astronaut James S. Voss, STS-102 mission specialist, poses with both Extravehicular Mobility Unit (EMU) space suits on the mid deck. Voss is one of two astronauts assigned to space walk duties after the Space Shuttle Discovery and the International Space Station (ISS) link in Earth orbit. The photograph was recorded with a digital still camera.

ISS024-E-011661 (11 Aug. 2010) --- NASA astronaut Doug Wheelock, Expedition 24 flight engineer, attired in his Extravehicular Mobility Unit (EMU) spacesuit, is pictured in the Quest airlock of the International Space Station during preparations for the second of three planned spacewalks to remove and replace an ammonia pump module that failed July 31.

STS102-E-5047 (10 March 2001) --- Astronaut James S. Voss, STS-102 mission specialist, inspects one of two Extravehicular Mobility Unit (EMU) helmets and other supplies on mid deck. Voss is one of two astronauts assigned to space walk duties after the Space Shuttle Discovery and the International Space Station (ISS) link in Earth orbit. The photograph was recorded with a digital still camera.

ISS024-E-011668 (11 Aug. 2010) --- NASA astronaut Tracy Caldwell Dyson, Expedition 24 flight engineer, attired in her Extravehicular Mobility Unit (EMU) spacesuit, is pictured in the Quest airlock of the International Space Station during preparations for the second of three planned spacewalks to remove and replace an ammonia pump module that failed July 31.

Expedition 39 flight engineers Steve Swanson and Rick Mastracchio work to remove and replace the Fan Pump Separator (FPS) on Extravehicular Mobility Unit (EMU) 3005. Image was taken in the Quest Airlock (A/L) and was released by Swanson on Instagram.

JSC2013-E-059969 (3 June 2013) --- Official portrait of European Space Agency astronaut Alexander Gerst in an Extravehicular Mobility Unit (EMU) spacesuit. Photo credit: NASA