NASA's crewmembers for Expedition 35 36 share a quiet moment during a rehearsal called a fit check at the Baikonur Cosmodrome.

NASA’s prime and backup crewmembers for Expedition 35-36 share a quiet moment March 17 during a systems dress rehearsal called a “fit check” at the Baikonur Cosmodrome in Kazakhstan. NASA Flight Engineer Chris Cassidy (left), Soyuz Commander Pavel Vinogradov and Flight Engineer Alexander Misurkin are preparing for launch to the International Space Station from Baikonur on March 29, Kazakh time. Cassidy’s backup, Michael Hopkins (right), is scheduled to launch to the station in September.

NASA/Victor Zelentsov