In this file photo, a U.S. military aide carrying the "President's emergency satchel," also known as "the football," with the nuclear launch codes, walks toward Marine One on the South Lawn of the White House in Washington, Tuesday, July 13, 2021, to join President Joe Biden for a short trip to Andrews Air Force Base, Md., and then on to Philadelphia. (AP Photo/Andrew Harnik) **FILE**
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