JSC2011-E-040338 (7 April 2011) --- NASA astronauts Sandy Magnus and Rex Walheim, both STS-135 mission specialists, work in the Multi-Purpose Logistics Module in the Space Station Processing Facility during the STS-135 Crew Equipment Interface Test (CEIT) at the Kennedy Space Center in Florida on April 7, 2011. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool