Best Photos of the Day

A field of 2,977 flags honoring those who died on September 11, 2001 is displayed during a 9/11 memorial at the Nixon Presidential Library and Museum on September 11, 2021 in Yorba Linda, California. The US marked the 20th anniversary of 9/11 Saturday with solemn ceremonies given added poignancy by the recent chaotic withdrawal of troops from Afghanistan and return to power of the Taliban. At the Richard Nixon Presidential Library and Museum Library, 23 tons of steel from the World Trade Center was displayed on a flatbed truck during a ceremony remembering those who died with speakers pledging to "Never Forget." Patrick T. FALLON / AFP

Tom Frost steps down after reading the names of people who died, including his daughter Lisa Frost who was aboard United Airlines flight 175, during a 9/11 memorial featuring steel beams from the World Trade Center at the Nixon Presidential Library and Museum on September 11, 2021 in Yorba Linda, California. The US marked the 20th anniversary of 9/11 Saturday with solemn ceremonies given added poignancy by the recent chaotic withdrawal of troops from Afghanistan and return to power of the Taliban. At the Richard Nixon Presidential Library and Museum Library, 23 tons of steel from the World Trade Center was displayed on a flatbed truck during a ceremony remembering those who died with speakers pledging to "Never Forget." Patrick T. FALLON / AFP

An attendee touches a steel beam from the World Trade Center during a 9/11 memorial at the Nixon Presidential Library and Museum on September 11, 2021 in Yorba Linda, California. The US marked the 20th anniversary of 9/11 Saturday with solemn ceremonies given added poignancy by the recent chaotic withdrawal of troops from Afghanistan and return to power of the Taliban. At the Richard Nixon Presidential Library and Museum Library, 23 tons of steel from the World Trade Center was displayed on a flatbed truck during a ceremony remembering those who died with speakers pledging to "Never Forget." Patrick T. FALLON / AFP

Roses adorn the name etched on the apron of the reflecting pool at the 9/11 Memorial & Museum during the commemoration the 20th anniversary of the 9/11 attacks on the World Trade Center, in New York, on September 11, 2021. ROBERTO SCHMIDT / AFP

Light bounces off of nearby buildings to light the edge of the north pool at the National 9/11 Memorial and Museum on September 11, 2021 in New York City. The nation is marking the 20th anniversary of the terror attacks of September 11, 2001, when the terrorist group al-Qaeda flew hijacked airplanes into the World Trade Center, Shanksville, PA and the Pentagon, killing nearly 3,000 people. Chip Somodevilla/Getty Images/AFP

First responders, including firemen, police, and military gather with friends and members of the public outside the 9/11 Museum and Memorial as they commemorate the 20th anniversary of the 9/11 attacks on the World Trade Center, in New York, on September 11, 2021. Ed JONES / AFP

Helicopters conduct a flyover past One World Trade Center and the National 9/11 Memorial and Museum on September 11, 2021 in New York City. The nation is marking the 20th anniversary of the terror attacks of September 11, 2001, when the terrorist group al-Qaeda flew hijacked airplanes into the World Trade Center, Shanksville, PA and the Pentagon, killing nearly 3,000 people. Chip Somodevilla/Getty Images/AFP

A woman whose father Joseph Amatuccio died on 9/11, lays flowers at the National 9/11 Memorial and Museum during the commemoration of the 20th anniversary attacks on the World Trade Center, in New York, on September 11, 2021. Ed JONES / AFP

A family member etches the name of a loved one during the annual 9/11 Commemoration Ceremony at the National 9/11 Memorial and Museum on September 11, 2021 in New York City. During the ceremony, six moments of silence were held, marking when each of the World Trade Center towers was struck and fell and the times corresponding to the attack on the Pentagon and the crash of Flight 93. The nation is marking the 20th anniversary of the terror attacks of September 11, 2001, when the terrorist group al-Qaeda flew hijacked airplanes into the World Trade Center, Shanksville, PA and the Pentagon, killing nearly 3,000 people. Michael M. Santiago/Getty Images/AFP

Bruce Springsteen performs during the annual 9/11 Commemoration Ceremony at the National 9/11 Memorial and Museum on September 11, 2021 in New York City. During the ceremony six moments of silence were held, marking when each of the World Trade Center towers was struck and fell and the times corresponding to the attack on the Pentagon and the crash of Flight 93. The nation is marking the 20th anniversary of the terror attacks of September 11, 2001, when the terrorist group al-Qaeda flew hijacked airplanes into the World Trade Center, Shanksville, PA and the Pentagon, killing nearly 3,000 people. Chip Somodevilla/Getty Images/AFP