STS-131 EVA 3 Prep

S131-E-009304 (13 April 2010) --- NASA astronauts Clayton Anderson (left) and Rick Mastracchio, both STS-131 mission specialists, attired in their Extravehicular Mobility Unit (EMU) spacesuits; along with astronauts James P. Dutton Jr., pilot; and Dorothy Metcalf-Lindenburger, mission specialist, are pictured in the Quest airlock of the International Space Station prior to the start of the mission's third and final spacewalk.