Expedition 54 Postflight Presentation at NASM NASA astronauts Mark Vande Hei, left, and Joe Acaba speak about their experiences onboard the International Space Station during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54.

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Keywords: 54, acaba, air, dc, expedition, hei, joe, joel, kowsky, mark, museume, nasa, national, postflight, smithsonian, space, usa, vande, washington