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President Donald Trump signs a piece of equipment as he and first lady Melania Trump participate in a tour of NASA facilities before viewing the SpaceX Demonstration Mission 2 Launch at Kennedy Space Center, Wednesday, May 27, 2020, in Cape Canaveral, Fla. Vice President Mike Pence, second from left, second lady Karen Pence, left, and NASA Administrator Jim Bridenstine look on. (AP Photo/Evan Vucci)