Spacesuit designer Oleg Gerasimenko shares some tips on the Sokol spacesuit with NASA astronaut Rex Walheim, STS-135 mission specialist, during a fit check at the Zvezda facility in Moscow March 28, 2011. The crew of the final shuttle mission traveled to Moscow for a suit fit check of their Russian spacesuits which would be required in the event of an emergency. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool