Expedition 24 Flight Engineer Doug Wheelock performs the traditional door signing prior to his launch to the International Space Station, Tuesday, June 15, 2010 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Wheelock was launched onboard the Soyuz rocket the following morning with Expedition 24 Flight Engineer Shannon Walker and Soyuz Commander Fyodor Yurchikhin on a mission to the ISS. Photo Credit: (NASA/Carla Cioffi)