NASA astronaut Terry Virts, and European Space Agency (ESA) astronaut Samantha Cristoforetti meet with NASA Administrator Charles Bolden, and NASA Deputy Administrator Dava Newman, 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