President Joe Biden and first lady Jill Biden walk with Gordon Felt, brother of Edward Porter Felt and President of Families for Flight 93, second from left, and Calvin Wilson the brother-in-law of First Officer LeRoy Homer, a passenger on Flight 93, second from right, to visit a boulder marking the impact site of Flight 93 at the Flight 93 National Memorial in Shanksville, Pa., Saturday, Sept. 11, 2021. The Bidens visited to commemorate the 20th anniversary of the Sept. 11, 2001, terrorist attacks. (AP Photo/Evan Vucci)
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