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s131e010088

December 30, 2011
S131-E-010088 (14 April 2010) --- NASA astronaut Tracy Caldwell Dyson, Expedition 23 flight engineer, equipped with a bungee harness, exercises on the Combined Operational Load Bearing External Resistance Treadmill (COLBERT) in the Harmony node of the International Space Station while space shuttle Discovery (STS-131) remains docked with the station.


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