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June 14, 2011
Astronaut Michel Tognini, mission specialist representing the French space agency (CNES), opens the gaseous nitrogen (GN2) freezer on Columbia's middeck. The freezer is flown in support of two plant growth experiments--Plant Growth Investigations in Microgravity (PGIM) and Biological Research in Canisters (BRIC). Throughout the mission Tognini periodically freezes samples from the experiments to provide glimpses of the plants in various stages of development.

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