PHOTOS: Remembering the Sept. 11 terror attacks, 18 years later

Americans are remembering the terror attacks of Sept. 11, 2001, which claimed 3,000 lives when hijacked planes slammed into the World Trade Center, the Pentagon and a field near Shanksville, Pennsylvania.

Eighteen years after the deadliest terrorist attack on American soil, the nation is still grappling with the aftermath at Ground Zero, in Congress and beyond.

All the victims’ names are read aloud at the Ground Zero ceremony in New York, where moments of silence and tolling bells mark the moments when the aircraft crashed and the Trade Center’s twin towers fell.


WATCH: Anniversary ceremonies in NY mark 18 years since 9/11 terrorist attacks


There has also been growing awareness in recent years of the suffering of another group of people tied to the tragedy: firefighters, police and others who died or fell ill after exposure to the wreckage and the toxins unleashed in it.

While research continues into whether those illnesses are tied to 9/11 toxins, a victims compensation fund for people with potentially Sept. 11-related health problems has awarded more than $5.5 billion so far. Over 51,000 people have applied.

The Associated Press contributed to this report.

New York Fire Department members attend a second funeral service for FDNY firefighter Michael Haub in Franklin Square, N.Y., Tuesday, Sept. 10, 2019. The firefighter from Long Island who died in the World Trade Center attacks is being remembered for a second time on the eve of the 18th anniversary of 9/11. Friends and family gathered at the memorial service for Haub on Tuesday in Franklin Square. Last week, the New York City medical examiner identified more of his remains recovered at ground zero. (AP Photo/Eduardo Munoz Alvarez)
New York Fire Department members attend a second funeral service for FDNY firefighter Michael Haub in Franklin Square, N.Y., Tuesday, Sept. 10, 2019. The firefighter from New York's Long Island who died in the World Trade Center attacks is being remembered for a second time on the eve of the 18th anniversary of 9/11. Friends and family gathered at the memorial service for Haub on Tuesday in Franklin Square. Last week, the New York City medical examiner identified more of his remains recovered at ground zero. (AP Photo/Eduardo Munoz Alvarez)
A visitor to the Flight 93 National Memorial in Shanksville, Pa., views the Wall of Names on Tuesday, Sept. 10, 2019, as the nation prepares to mark the 18th anniversary of the Sept. 11, 2001 attacks. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial in Shanksville, Pa., participate in a sunset memorial service on Tuesday, Sept. 10, 2019, as the nation prepares to mark the 18th anniversary of the Sept. 11, 2001 attacks. (AP Photo/Gene J. Puskar)
AP Photo/Mark Lennihan
President Donald Trump and first lady Melania Trump participate in a moment of silence honoring the victims of the Sept. 11 terrorist attacks, on the South Lawn of the White House, Wednesday, Sept. 11, 2019, in Washington. (AP Photo/Evan Vucci)

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