Chris Cassidy certifying he is prepared to begin qualification simulation runs in a Soyuz spacecraft mockup.

At the Gagarin Cosmonaut Training Center in Star City, Russia, Expedition 35-36 Flight Engineer Chris Cassidy of NASA (second from left) signs a book before Russian space officials March 5, certifying that he is prepared to begin qualification simulation runs in a Soyuz spacecraft mockup. Looking on are Soyuz Commander Pavel Vinogradov (second from right) and Flight Engineer Alexander Misurkin (right). The three crewmembers are training for launch March 29, Kazakh time, to the International Space Station in their Soyuz TMA-08M spacecraft from the Baikonur Cosmodrome in Kazakhstan.
NASA / Stephanie Stoll