This #IOTW from @esaspaceflight features an essential part of training for spaceflight… here @Astro_Alex and @AstroSerena are learning the finer points of @Space_Station plumbing
Find out more: https://t.co/o4GStvFej7 pic.twitter.com/QtvIUx7LRj— ESA (@esa) April 12, 2018
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