NASA astronaut Rex Walheim undergoes a fit check of his Sokol space suit at the Zvezda facility on Monday, March 28, 2011, in Moscow. The crew of the final shuttle mission traveled to Moscow for a suit fit check of their Russian Soyuz suits that will be required in the event of an emergency. Walheim's name appears first in English and then in Russian on his suit. The order is reversed on the suits of Russian Cosmonauts. ( NASA Photo / Houston Chronicle, Smiley N. Pool ) STS-135 Rex Walheim undergoes a fit check of his Sokol suit

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