NASA astronaut Doug Hurley waits in a pressure chamber before a test of his Russian Sokol spacesuit at the Zvezda facility in Moscow.

NASA astronaut Doug Hurley, STS-135 pilot, waits in a pressure chamber before a test of his Russian Sokol spacesuit at the Zvezda facility in Moscow on March 30, 2011. The crew of the final shuttle mission traveled to Moscow for a suit fit check of their Russian Sokol suits which would be required in the event of an emergency. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool