Expedition 43 backup crew members Sergei Volkov, left, and Alexey Ovchinin and of the Russian Federal Space Agency (Roscosmos), center, and NASA Astronaut Jeff Williams attend a training briefing, Saturday, March 21, 2015 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Expedition 43 prime crew members: NASA Astronaut Scott Kelly, and Russian Cosmonauts Gennady Padalka, and Mikhail Kornienko of the Russian Federal Space Agency (Roscosmos) are scheduled to launch to the International Space Station in the Soyuz TMA-16M spacecraft from the Baikonur Cosmodrome in Kazakhstan March 28, Kazakh time (M

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