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World Trade Center victims honored

A member of the FDNY visits the reflecting pool during a ceremony at the National September 11 Memorial & Museum commemorating the 20th anniversary of the September 11th terrorist attacks on the World Trade Center on September 11, 2021 in New York City. (Photo by Mike Segar-Pool/Getty Images)

PHOTO: Pool

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Former presidents attend World Trade Center ceremony

Former President Barack Obama, former First Lady Michelle Obama and President Joe Biden, First Lady Dr. Jill Biden, attend ceremonies to commemorate the 20th anniversary of the Sept. 11 terrorist attacks, Saturday, Sept. 11, 2021, at the National September 11 Memorial & Museum in New York. Former President Bill Clinton and former First Lady Hillary Clinton also attended. (AP Photo/John Minchillo)

PHOTO: John Minchillo

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Families remember victims of World Trade Center attacks

Katie Mascali is comforted by her fiance Andre Jabban as they stand near the name of her father Joseph Mascali during a ceremony at the National September 11 Memorial & Museum commemorating the 20th anniversary of the September 11th terrorist attacks on the World Trade Center on September 11, 2021 in New York City. (Photo by Craig Ruttle / POOL / AFP) (Photo by CRAIG RUTTLE/POOL/AFP via Getty Images)

PHOTO: CRAIG RUTTLE

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FDNY honors their fallen

A member of the Fire Department of New York (FDNY) stands by the north reflecting pool during a ceremony at the National September 11 Memorial & Museum on Sept. 11, 2021.

PHOTO: Pool

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Rudy Giuliani attends World Trade Center ceremony

Former New York City Mayor Rudy Giuliani (C) attends the annual 9/11 Commemoration Ceremony at the National 9/11 Memorial and Museum on September 11, 2021 in New York City. (Photo by Chip Somodevilla / POOL / Getty Images) (Photo by CHIP SOMODEVILLA/POOL/AFP via Getty Images)

PHOTO: CHIP SOMODEVILLA

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America pauses to mourn those lost on 9/11

People mourn at the North reflecting pool during a ceremony at the National September 11 Memorial & Museum on Sept. 11, 2021.

PHOTO: Pool

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World Trade Center victims remembered

A person touches the name of a victim on the 9/11 Memorial during a ceremony at the National September 11 Memorial & Museum commemorating the 20th anniversary of the September 11th terrorist attacks on the World Trade Center on September 11, 2021 in New York City. (Photo by Mike Segar-Pool/Getty Images)

PHOTO: Pool

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World Trade Center hosts 9/11 ceremony

Melinda Moran and Haydee Lillo embrace after finding out they lost people who knew each other, next to the North Reflecting Pool during a ceremony at the National September 11 Memorial & Museum commemorating the 20th anniversary of the September 11th terrorist attacks on the World Trade Center on September 11, 2021 in New York City.

PHOTO: Pool

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Pentagon marks 20 years since 9/11

Arlington, Va. Fire Department ladder trucks fly an American flag prior to an observance ceremony on the morning of the 20th anniversary of the terrorist attacks, Saturday, Sept. 11, 2021, at the Pentagon. (AP Photo/Alex Brandon)

PHOTO: Alex Brandon

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Bell rung as victims’ names read at Pentagon

A bell is rung as names of the deceased are read during an observance ceremony at the Pentagon in Washington, Saturday, Sept. 11, 2021, on the morning of the 20th anniversary of the terrorist attacks. (AP Photo/Alex Brandon)

PHOTO: Alex Brandon

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Pentagon marks 20th anniversary of 9/11

People stand for the national anthem as they attend the Pentagon 9/11 observance ceremony at the National 9/11 Pentagon Memorial on September 11, 2021 in Arlington, Virginia.

PHOTO: Win McNamee

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9/11 victims honored at Pentagon

A rose lays on a bench at the National 9/11 Pentagon Memorial on September 11, 2021 in Arlington, Virginia.

PHOTO: Win McNamee

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Gen. Mark A. Milley delivers remarks

Chairman of the Joint Chiefs of Staff Gen. Mark A. Milley delivers remarks during the Pentagon 9/11 observance ceremony at the National 9/11 Pentagon Memorial on September 11, 2021 in Arlington, Virginia.

PHOTO: Win McNamee

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Pentagon remembers 9/11

An American flag is unfurled at the Pentagon in Washington, Saturday, Sept. 11, 2021, at sunrise on the morning of the 20th anniversary of the terrorist attacks. The American flag is draped over the site of impact at the Pentagon. (AP Photo/J. Scott Applewhite)

PHOTO: J. Scott Applewhite

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Pentagon hosts 9/11 ceremony

Secretary of Defense Lloyd Austin (L) and Chairman of the Joint Chiefs of Staff Gen. Mark A. Milley stand for the national anthem during the Pentagon 9/11 observance ceremony at the National 9/11 Pentagon Memorial on September 11, 2021 in Arlington, Virginia.

PHOTO: Win McNamee

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Flight 93 passengers, crew remembered

A National Park Service ranger stands in front of the Wall of Names at the Flight 93 National Memorial in Shanksville, Pa. before a Service of Remembrance Saturday, Sept. 11, 2021, as the nation marks the 20th anniversary of the Sept. 11, 2001 attacks. (AP Photo/Gene J. Puskar)

PHOTO: Gene J. Puskar

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Flight 93 victims’ names read during ceremony

Bells are rung during a 9/11 commemoration at the Flight 93 National Memorial in Shanksville, Pennsylvania on September 11, 2021.

PHOTO: MANDEL NGAN

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George W. Bush delivers remarks at Flight 93 ceremony

Former U.S. President George W. Bush speaks during a 9/11 commemoration at the Flight 93 National Memorial in Shanksville, Pennsylvania on September 11, 2021.

PHOTO: MANDEL NGAN

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