A person looks at flags before the commemoration ceremony of the Sept. 11, 2001, terror attacks, Monday, Sept. 11, 2023, in New York. Americans are looking back on the horror and legacy of 9/11, gathering Monday at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil.(AP Photo/Yuki Iwamura)

Diane Massaroli holds a picture of her late husband, Michael Massaroli, before the commemoration ceremony of the Sept. 11, 2001, terror attacks, Monday, Sept. 11, 2023, in New York. Americans are looking back on the horror and legacy of 9/11, gathering Monday at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil.(AP Photo/Yuki Iwamura)

A person looks at flags before the commemoration ceremony of the Sept. 11, 2001, terror attacks, Monday, Sept. 11, 2023, in New York. Americans are looking back on the horror and legacy of 9/11, gathering Monday at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil. (AP Photo/Yuki Iwamura)

People carrying a wreath arrive at the commemoration ceremony of the Sept. 11, 2001, terror attacks, Monday, Sept. 11, 2023, in New York. Americans are looking back on the horror and legacy of 9/11, gathering Monday at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil. (AP Photo/Yuki Iwamura)

Port Authority Academy recruits stand in line before the commemoration ceremony on the 22nd anniversary of the September 11, 2001, terror attacks on Monday, Sept. 11, 2023, in New York. (AP Photo/Yuki Iwamura)

People hold a flag containing names of victims, before the commemoration ceremony on the 22nd anniversary of the September 11, 2001, terror attacks on Monday, Sept. 11, 2023, in New York. (AP Photo/Yuki Iwamura)

Members of marching bands stand near the September 11 Memorial & Museum before the commemoration ceremony on the 22nd anniversary of the September 11, 2001, terror attacks on Monday, Sept. 11, 2023, in New York. (AP Photo/Yuki Iwamura)

Former New York City Mayor Michael Bloomberg is seen before the commemoration ceremony on the 22nd anniversary of the September 11, 2001, terror attacks on Monday, Sept. 11, 2023, in New York. (AP Photo/Yuki Iwamura)

The shadows of President of Flight 93 Familes, Gorden Felt, left, and park ranger Betsy Keene are shown at the Wall of Names at the Flight 93 National Memorial in Shanksville, Pa., Monday, Sept.11, 2023. Americans are looking back on the horror and legacy of 9/11, gathering Monday at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil. (John Rucosky/Tribune-Democrat via AP)

Gordon Felt, president of Families for Flight 93, left, speaks with Chaplain Gary Monroe of the USS Somerset at the Memorial Plaza at 22nd Memorial Service, Flight 93 National Memorial on Monday, Sept. 11, 2023. (Todd Berkey/The Tribune-Democrat via AP)

A member of the military checks his phone as he waits for the start of events for the 22nd anniversary of the 9/11 attacks at the Pentagon in Washington, DC, on September 11, 2023. (Photo by ANDREW CABALLERO-REYNOLDS / AFP)

A man walks past American flags and flowers lining the memorial pool at the National September 11 Memorial to mark the 22nd anniversary of the 9/11 terror attack at the World Trade Center on September 11, 2023 in New York. (Photo by Bryan R. Smith / AFP)

A man takes a photograph at the National 9/11 Pentagon Memorial on the 22nd anniversary of the September 11, 2001 terrorist attack on the Pentagon, in Washington, DC, on September 11, 2023. (Photo by ANDREW CABALLERO-REYNOLDS / AFP)

A woman places her hand on the 9/11 memorial pool, on the 22nd anniversary of the terror attack on the World Trade Center, in New York City on September 11, 2023. (Photo by KENA BETANCUR / AFP)

People look at the 9/11 memorial pool prior to a remembrance ceremony on the 22nd anniversary of the terror attack on the World Trade Center, in New York City on September 11, 2023. (Photo by KENA BETANCUR / AFP)

People look at the 9/11 memorial pool prior to a remembrance ceremony on the 22nd anniversary of the terror attack on the World Trade Center, in New York City on September 11, 2023. (Photo by KENA BETANCUR / AFP)

Law enforcement officers stand at the 9/11 memorial pool prior to a remembrance ceremony on the 22nd anniversary of the terror attack on the World Trade Center, in New York City on September 11, 2023. (Photo by KENA BETANCUR / AFP)

Law enforcement officers stand at the 9/11 memorial pool prior to a remembrance ceremony on the 22nd anniversary of the terror attack on the World Trade Center, in New York City on September 11, 2023. (Photo by KENA BETANCUR / AFP)

The US flag is lowered to half mast on the 22nd anniversary of the September 11, 2001 terrorist attacks, outside the US Capitol in Washington, DC, on September 11, 2023. (Photo by Brendan SMIALOWSKI / AFP)

American flags line a memorial pool at the National September 11 Memorial to mark the 22nd anniversary of the 9/11 terror attack at the World Trade Center on September 11, 2023 in New York. (Photo by Bryan R. Smith / AFP)

American flags and flowers line the memorial pool at the National September 11 Memorial to mark the 22nd anniversary of the 9/11 terror attack at the World Trade Center on September 11, 2023 in New York. (Photo by Bryan R. Smith / AFP)

A visitor takes a photo of some of the 3,000 flags representing the victims of the September 11, 2001 terrorist attacks on the campus of Pepperdine University on September 8, 2023 in Malibu, California. US President Joe Biden will observe the 22nd anniversary of the worst terrorist attack on US soil with an observance at an Alaska military base. (Photo by Robyn Beck / AFP)

A visitor looks at some of the 3,000 flags representing the victims of the September 11, 2001 terrorist attacks on the campus of Pepperdine University on September 8, 2023 in Malibu, California. US President Joe Biden will observe the 22nd anniversary of the worst terrorist attack on US soil with an observance at an Alaska military base. (Photo by Robyn Beck / AFP)

A visitor looks at some of the nearly 3,000 flags representing the victims of the September 11, 2001 terrorist attacks on the campus of Pepperdine University on September 8, 2023 in Malibu, California. US President Joe Biden will observe the 22nd anniversary of the worst terrorist attack on US soil with an observance at an Alaska military base. (Photo by Robyn Beck / AFP)

A visitor looks at some of the nearly 3,000 flags representing the victims of the September 11, 2001 terrorist attacks on the campus of Pepperdine University on September 8, 2023 in Malibu, California. US President Joe Biden will observe the 22nd anniversary of the worst terrorist attack on US soil with an observance at an Alaska military base. (Photo by Robyn Beck / AFP)

A visitor looks at some of the nearly 3,000 flags representing the victims of the September 11, 2001 terrorist attacks on the campus of Pepperdine University on September 8, 2023 in Malibu, California. US President Joe Biden will observe the 22nd anniversary of the worst terrorist attack on US soil with an observance at an Alaska military base. (Photo by Robyn Beck / AFP)

The Santa Monica Mountains are the backdrop for some of the nearly 3,000 flags representing the victims of the September 11, 2001 terrorist attacks on the campus of Pepperdine University on September 8, 2023 in Malibu, California. US President Joe Biden will observe the 22nd anniversary of the worst terrorist attack on US soil with an observance at an Alaska military base. (Photo by Robyn Beck / AFP)

Some of the nearly 3,000 flags representing the victims of the September 11, 2001 terrorist attacks are seen on the campus of Pepperdine University on September 8, 2023 in Malibu, California. US President Joe Biden will observe the 22nd anniversary of the worst terrorist attack on US soil with an observance at an Alaska military base. (Photo by Robyn Beck / AFP)

Some of the nearly 3,000 flags representing the victims of the September 11, 2001 terrorist attacks are seen on the campus of Pepperdine University on September 8, 2023 in Malibu, California. US President Joe Biden will observe the 22nd anniversary of the worst terrorist attack on US soil with an observance at an Alaska military base. (Photo by Robyn Beck / AFP)

Some of the nearly 3,000 flags representing the victims of the September 11, 2001 terrorist attacks are seen on the campus of Pepperdine University on September 8, 2023 in Malibu, California. US President Joe Biden will observe the 22nd anniversary of the worst terrorist attack on US soil with an observance at an Alaska military base. (Photo by Robyn Beck / AFP)

Some of the nearly 3,000 flags representing the victims of the September 11, 2001 terrorist attacks are seen on the campus of Pepperdine University on September 8, 2023 in Malibu, California. US President Joe Biden will observe the 22nd anniversary of the worst terrorist attack on US soil with an observance at an Alaska military base. (Photo by Robyn Beck / AFP)

FILE — An American flag is unfurled at the Pentagon, in Washington, Sept. 11, 2021, at sunrise on the morning of the 20th anniversary of the terrorist attacks. Americans are looking back on the horror and legacy of 9/11, gathering Monday, Sept. 11, 2023, at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil. (AP Photo/Alex Brandon)

FILE — The twin reflecting pools, center, of the National September 11 Memorial are illuminated during the evening, April 1, 2012, at the World Trade Center, in New York. Americans are looking back on the horror and legacy of 9/11, gathering Monday, Sept. 11, 2023, at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil. (AP Photo/Mark Lennihan, File)

FILE — Identical twins Janita Ollison, left ,and Jeannetta Ollison 17, of Gresham Oregon, try to read some of the names of 9/11 victims printed on more than twenty -six hundred "Flags of Honor" erected as a memorial to represent each person killed by terrorist attacks, Sept. 11, 2001 in Gresham Ore., Wednesday, Sept. 10, 2003. Americans are looking back on the horror and legacy of 9/11, gathering Monday, Sept. 11, 2023, at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil. (AP Photo/John Klicker, File)

FILE — Hundreds of American flags surround a memorial to the victims of the Sept. 11 terrorist attacks, behind Eastlake, Ohio, City Hall, Sept. 6, 2002. Americans are looking back on the horror and legacy of 9/11, gathering Monday, Sept. 11, 2023, at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil. (AP Photo/Mark Duncan, File)

FILE — An American flag flies from a makeshift altar overlooking the ongoing investigation of the United Flight 93 crash site, in Shanksville, Pa., Sept. 16, 2001. Americans are looking back on the horror and legacy of 9/11, gathering Monday, Sept. 11, 2023, at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil. (AP Photo/Gene J. Puskar, File)

FILE — First responders work at ground zero after the Sept.11 attacks, Sept. 12, 2001, in New York. Americans are looking back on the horror and legacy of 9/11, gathering Monday, Sept. 11, 2023, at memorials, firehouses, city halls and elsewhere to observe the 22nd anniversary of the deadliest terror attack on U.S. soil. (AP Photo/Suzanne Plunkett, File)

FILE - Firefighters work beneath the destroyed mullions, the vertical struts which once faced the soaring outer walls of the World Trade Center towers, after a terrorist attack in New York, Sept. 11, 2001. The remains of two people who died in the 9/11 attack on the World Trade Center have been identified, the latest positive identification in the decadeslong effort to return victims to their families. Authorities confirmed the identification of the remains of a man and woman days ahead of the 22nd anniversary of the hijacked-plane attack that killed nearly 3,000 people in Lower Manhattan. (AP Photo/Mark Lennihan, File)