Expedition 37/38 Michael Hopkins flexes his arms during a pressure check as part of a fit check dress rehearsal training exercise.

At the Baikonur Cosmodrome in Kazakhstan, Expedition 37/38 Flight Engineer Michael Hopkins of NASA flexes his arms during a pressure check of his Russian Sokol launch and entry suit Sept. 14 as part of a “fit check” dress rehearsal training exercise. Hopkins, Soyuz Commander Oleg Kotov and Flight Sergey Ryazanskiy are preparing for launch Sept. 26, Kazakh time, from Baikonur on their Soyuz TMA-10M spacecraft to begin a five and a half month mission on the International Space Station.

NASA/Victor Zelentsov