Stock Photo - Astronauts Stephen N. Frick (right) and Rex J. Walheim, STS-122 commander and mission specialist, respectively, exchange thoughts as they prepare for a training session in the Neutral Buoyancy Laboratory (NBL) near Johnson Space Center.

Stock Photo: Astronauts Stephen N. Frick (right) and Rex J. Walheim, STS-122 commander and mission specialist, respectively, exchange thoughts as they prepare for a training.

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