JSC2010-E-195523 (3 Dec. 2010) --- NASA astronaut Chris Ferguson, STS-135 commander, dons a training version of his shuttle launch and entry suit in preparation for an emergency egress training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. United Space Alliance suit technician Jeremy Spruell assisted Ferguson. STS-135 is planned to be the final mission of the space shuttle program. Photo credit: NASA or National Aeronautics and Space Administration