JSC2011-E-040286 (24 March 2011) --- NASA astronauts Sandy Magnus, STS-135 mission specialist, and Chris Ferguson, commander, are seen through a hatch as the crew of STS-135 debriefs after a post-insertion training session in the Full-Fuselage Trainer in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center on March 24, 2011. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool