Expedition 56-57 crew members train for their mission inside a space station simulator at the Johnson Space Center.
jsc2018e005507 (February 9, 2018) — Expedition 56-57 crew members (from left) Sergei Propokev of Roscosmos, Alexander Gerst of the European Space Agency and Serena Auñón-Chancellor of NASA train for their mission inside a space station simulator at the Johnson Space Center.