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March 12, 2014
(24 May 2011) --- NASA astronauts Michael Fincke (bottom), STS-134 mission specialist; and Ron Garan, Expedition 28 flight engineer, perform maintenance on the Carbon Dioxide Removal Assembly (CDRA) in the Air Revitalization 2 (AR2) rack in the Tranquility node of the International Space Station while space shuttle Endeavour remains docked with the station.

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