Stock Photo - Astronaut Tim Kopra, STS-127 mission specialist converting to Expedition 20 flight engineer, is all smiles prior to donning his helmet and performing the final touches of suiting-up in the International Space Station's Quest airlock. He later joined astronaut Dave Wolf, STS-127 mission specialist, for the first of five scheduled sessions of extravehicular activity, requiring four different astronauts for the outside activities.

Stock Photo: Astronaut Tim Kopra, STS-127 mission specialist converting to Expedition 20 flight engineer, is all smiles prior to donning his helmet and performing the final.

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