Expedition 57 crew member Alexander Gerst of ESA (European Space Agency) is seen during a welcome ceremony at the Zhezkazgan, Kazakhstan airport shortly after he landed in a Soyuz MS-09 spacecraft with Sergey Prokopyev of Roscosmos, and Serena Auñón-Chancellor of NASA on Thursday, Dec. 20, 2018. Auñón-Chancellor, Gerst, and Prokopyev are returning after 197 days in space where they served as members of the Expedition 56 and 57 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)