Russia Space Station

NASA astronaut Andrew J. Feustel, center, and Russian Cosmonauts Oleg Artemyev, left, and Sergej Prokopyev attend a three-day winter training session in a forest at Russian Space Training Center in Star City, outside Moscow, Russia, Wednesday, Feb. 8, 2017. The three are being trained for a future mission to the International Space Station. (AP Photo/Pavel Golovkin)

NASA astronaut Andrew J. Feustel, center, and Russian Cosmonauts Oleg Artemyev, left, and Sergej Prokopyev attend a three-day winter training session in a forest at Russian Space Training Center in Star City, outside Moscow, Russia, Wednesday, Feb. 8, 2017. The three are being trained for a future mission to the International Space Station. (AP Photo/Pavel Golovkin)