JSC2009-E-285098 (16 Dec. 2009) --- Astronaut Rick Mastracchio, STS-131 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Astronaut James P. Dutton Jr., pilot, assisted Mastracchio.