Expedition 31 Preflight (201204230008HQ)

Expedition 31 backup crew members Kevin Ford (left), Oleg Novitskiy and Evgeny Tarelkin (right) give the thumbs up before their final qualification test in preparation for flight, Monday, April 23, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. Expedition 31 prime crew members commander Gennady Padalka, flight engineers Joe Acaba and Sergei Revin practiced similar scenarios nearby in advance of their final approval for launch to the International Space Station, scheduled for May 15, 2012. Photo Credit: (NASA/Carla Cioffi)