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Expedition 25 crew members take a break from training at NASA's Johnson Space Center to pose for a crew portrait. Pictured at center right is NASA astronaut Doug Wheelock, commander. Also pictured (from the left) are Russian cosmonauts Oleg Skripochka and Alexander Kaleri; NASA astronauts Scott Kelly and Shannon Walker; along with Russian cosmonaut Fyodor Yurchikhin, all flight engineers.