The Russian Soyuz TMA-18 spacecraft, carrying the International Space Station (ISS) crew of U.S. astronaut Tracy Caldwell Dyson and Russian cosmonauts Alexander Skvortsov and Mikhail Kornienko, blasts off from its launchpad at Baikonur cosmodrome April 2, 2010. A U.S.-Russian crew blasted off on Friday for a half-year mission aboard the ISS. REUTERS/Sergei Karpukhin (KAZAKHSTAN - Tags: SCI TECH)