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Russian security forces and their dog walk along the train track to the Soyuz launch pad, Tuesday, March 26, 2013 at the Baikonur Cosmodrome in Kazakhstan.

Launch of the Soyuz rocket is scheduled for March 29 and will send Expedition 35 Soyuz Commander Pavel Vinogradov of Russia, and Flight Engineers Chris Cassidy of NASA and Alexander Misurkin of Russia on a five-and-a-half-month mission aboard the International Space Station. Carla Cioffi/NASA