Stock Photo - NASA astronaut Jeff Williams (left), Expedition 47 flight engineer and Expedition 48 commander; and Russian cosmonaut Alexey Ovchinin, Expedition 4748 flight engineer, participate in a routine operations training session in an International Space Station mock-uptrainer in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center.Lauren Harnett

Stock Photo: NASA astronaut Jeff Williams (left), Expedition 47 flight engineer and Expedition 48 commander; and Russian cosmonaut Alexey Ovchinin.

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