AirshowAt Red Square in Moscow, Expedition 55 backup crewmember Nick Hague of NASA lays flowers at the Kremlin Wall where Russian space icons are interred as part of pre-launch activities Feb. 22. Looking on is crewmate Alexey Ovchinin of Roscosmos (left). They are backups to the prime crew, Drew Feustel of NASA, Oleg Artemyev of Roscosmos and Ricky Arnold of NASA, who will launch March 21 on the Soyuz MS-08 spacecraft from the Baikonur Cosmodrome in Kazakhstan for a five-month mission on the International Space Station...Gagarin Cosmonaut Training Center/Andrey Shelepin and Irina Spektor .