The Tribute In Light shines up from Lower Manhattan on Sept. 11, 2021.
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9/11 20th Anniversary
Sheryl Magnuson places a flower in her father's name at the National 9/11 Memorial.
Guests in Shanksville, Pa., remember Flight 93.
The president, vice president and their spouses present a wreath.
An American flag is unfurled on the side of the Pentagon.
The Flight 93 National Memorial in Shanksville, Pa.
Retired Paramedic Chief Charlie Wells kisses the name of a relative killed in the attack on the World Trade Center.
Family members of victims attend the annual ceremony in New York City.
A member of the New York City Fire Department salutes during a memorial ceremony.
Barack Obama, Michelle Obama, President Joe Biden, Jill Biden and Mike Bloomberg at the New York ceremony.
Visitors left flowers at the 9/11 Memorial pools.
The Tribute In Light shines up from Lower Manhattan on Sept. 11, 2021.
