WASHINGTON (Reuters) -- U.S. President Joe Biden on Friday called for national unity as the United States prepared to mark the 20th anniversary of the Sept. 11, 2001, attacks that killed 2,977 people, calling it America's greatest strength in the face of adversity.
20 years after 9/11
Biden calls for unity as US marks 20th anniversary of 9/11
President says 'darker forces of human nature' had bent, but not broken, solidarity
U.S. President Joe Biden and first lady Jill Biden will visit New York City on Saturday. © Reuters
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