NASA astronaut Terry Virts, and European Space Agency (ESA) astronaut Samantha Cristoforetti meet with NASA Deputy Administrator Dava Newman, and NASA Administrator Charles Bolden, Tuesday, Sept. 15, 2015 at NASA Headquarters in Washington. Photo Credit: (NASA/Bill Ingalls)

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Keywords: .., agency, bill, bolden, charles, cristoforetti, dava, european, headquarters, ingalls, nasa, newman, samantha, space, terry, usa, virts, washington