Behind the Cosmonaut Hotel crew quarters in Baikonur, Kazakhstan, Expedition 31/32 Flight Engineer Joe Acaba of NASA (center) plants a tree in his name in a traditional ceremony May 10, 2012 as his crewmates looked on. Acaba will launch on the Soyuz TMA-04M spacecraft on May 15 from the Baikonur Cosmodrome with Soyuz Commander Gennady Padalka (left) and Flight Engineer Sergei Revin (right) for a four-month mission on the International Space Station. NASA/Victor Zelentsov

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