Expedition 56 flight engineer Alexander Gerst of ESA (European Space Agency) performs the traditional door signing at the Cosmonaut Hotel prior to departing the hotel for launch on a Soyuz rocket with fellow crewmates Serena Auñón-Chancellor of NASA and Sergey Prokopyev of Roscosmos, Wednesday, June 6, 2018 in Baikonur, Kazakhstan. Gerst, Auñón-Chancellor, and Prokopyev will launch in their Soyuz MS-09 spacecraft to the International Space Station to being a six month mission. Photo Credit: (NASA/Joel Kowsky)