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  • Clayton Anderson and Rick Mastracchio› View High-res
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    S131-E-008655 (11 April 2010) --- NASA astronauts Clayton Anderson (left) and Rick Mastracchio, both STS-131 mission specialists, attired in their Extravehicular Mobility Unit (EMU) spacesuits; along with astronauts Tracy Caldwell Dyson (center left), Expedition 23 flight engineer; James P. Dutton Jr., STS-131 pilot; and Dorothy Metcalf-Lindenburger, mission specialist, pose for a photo in the Quest airlock of the International Space Station prior to the start of the mission's second spacewalk.

  • Rick Mastracchio› View High-res
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    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.

  • James P. Dutton Jr, Tracy Caldwell Dyson and Dorothy Metcalf-Lindenburger› View High-res
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    S131-E-008668 (11 April 2010) --- NASA astronauts James P. Dutton Jr., STS-131 pilot; Tracy Caldwell Dyson (second right), Expedition 23 flight engineer; and Dorothy Metcalf-Lindenburger, mission specialist, assist astronaut Rick Mastracchio, mission specialist, with his Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station in preparation for the start of the mission's second spacewalk.

  • Rick Mastracchio and Clayton Anderson› View High-res
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    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.

  • Dorothy Metcalf-Lindenburger› View High-res
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    S131-E-008679 (11 April 2010) --- NASA astronaut Dorothy Metcalf-Lindenburger, STS-131 mission specialist, looks through an overhead window on the aft flight deck of space shuttle Discovery while docked with the International Space Station.

  • Rick Mastracchio and Clayton Anderson› View High-res
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    S131-E-008700 (11 April 2010) --- NASA astronaut Rick Mastracchio (bottom) and Clayton Anderson, both STS-131 mission specialists, participate in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and Anderson unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station's Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

  • Clayton Anderson› View High-res
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    S131-E-008704 (11 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Anderson and Rick Mastracchio (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station's Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

  • Rick Mastracchio and Clayton Anderson› View High-res
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    S131-E-008708 (11 April 2010) --- NASA astronaut Rick Mastracchio (left) and Clayton Anderson, both STS-131 mission specialists, participate in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and Anderson unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station's Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

  • Rick Mastracchio and Clayton Anderson› View High-res
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    S131-E-008710 (11 April 2010) --- NASA astronauts Rick Mastracchio (left) and Clayton Anderson, both STS-131 mission specialists, participate in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and Anderson unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station's Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

  • Clayton Anderson on the middeck of Discovery› View High-res
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    S131-E-008741 (11 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, is pictured on the middeck of space shuttle Discovery while docked with the International Space Station.