Ellen Stofan, PhD, Director of the Smithsonian National Air and Space Museum. (Credit: Jim Preston, Smithsonian National Air and Space Museum) | Mercury

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Ellen Stofan, PhD, Director of the Smithsonian National Air and Space Museum. (Credit: Jim Preston, Smithsonian National Air and Space Museum)

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Created By: adavidson38 - 01/09/2021 16:20 PM

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