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June 1, 2011
Astronaut Kathryn C. Thornton, STS-73 payload commander, works at the Drop Physics Module (DPM) on the portside of the science module aboard the Space Shuttle Columbia in Earth-orbit. Payload specialist Albert Sacco Jr. conducts an experiment at the Glovebox. This frame was exposed with the color Electronic Still Camera (ESC) assigned to the 16-day United States Microgravity Laboratory (USML-2) mission.

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