U.S. astronaut Steven Swanson, left, Russian cosmonauts Alexander Skvortsov, center, and Oleg Artemyev, crew members of the mission to the International Space Station (ISS) walk prior the launch of Soyuz-FG rocket at the Russian leased Baikonur cosmodrome, Kazakhstan, Wednesday, March 26, 2014. (AP Photo/Dmitry Lovetsky, Pool)