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NASA astronaut Ricky Arnold speaks about his time onboard the International Space Station, Thursday, May 2, 2019 at NASA’s Goddard Space Flight Center in Greenbelt, Md. During Arnold’s 197 days onboard the International Space Station, as part of Expeditions 55 and 56, he ventured outside the space station on three spacewalks in addition to conducting numerous experiments and educational downlink events. Photo Credit: (NASA/Joel Kowsky)
