NASA Astronaut Jeff Williams answers a question from an audience member after speaking about his time onboard the International Space Station during Expeditions 47 and 48 Thursday, March 23, 2017 at Smithsonian's National Air and Space Museum in Washington. Jeff Williams completed his fourth mission when he landed in a remote area near the town of Zhezkazgan, Kazakhstan in September 2016, breaking the record for most days in space with a total of 534 days. Photo Credit: (NASA/Aubrey Gemignani)

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Keywords: 48, air, aubrey, dc, expedition, gemignani, jeff, museum, nasa, national, smithsonian, space, usa, washington, williams