NEW YORK — As the United States observes 24 years since the Sept. 11, 2001, attacks, people are taking part in solemn ceremonies, volunteering, and other activities to pay tribute to the victims.

On Thursday, many relatives of the nearly 3,000 individuals who lost their lives will gather with dignitaries and politicians at remembrance events in New York, at the Pentagon, and in Shanksville, Pennsylvania.

Others choose to mark the day at more intimate gatherings.

James Lynch, who lost his father, Robert Lynch, in the World Trade Center attack, mentioned that he and his family plan to attend a local ceremony in New Jersey before spending the day at the beach.

“Grief is something that never truly disappears,” Lynch commented as he and his family, along with countless other volunteers, prepared meals for those in need at a 9/11 charity event in Manhattan on the eve of the anniversary. “Discovering joy amidst the grief has been a significant aspect of my personal growth,” he added.

The memorials are occurring against a backdrop of heightened political tensions. Traditionally viewed as a day for national solidarity, this year’s 9/11 anniversary follows the previous day’s tragic incident where conservative activist Charlie Kirk was fatally shot while speaking at a college in Utah.

Authorities have indicated that Kirk’s death is likely to lead to increased security measures at the World Trade Center site during the 9/11 commemoration events in New York.

At ground zero in lower Manhattan, the names of the attack victims will be read aloud by family and loved ones in a ceremony attended by Vice President JD Vance and his wife, second lady Usha Vance. Moments of silence will mark the exact times when hijacked planes struck the World Trade Center’s iconic twin towers, as well as when the skyscrapers fell.

At the Pentagon in Virginia, the 184 service members and civilians killed when hijackers steered a jetliner into the headquarters of the U.S. military will be honored. President Donald Trump and first lady Melania Trump will attend the service before heading to the Bronx for a baseball game between the New York Yankees and Detroit Tigers Thursday evening.

And in a rural field near Shanksville, Pennsylvania, a similar ceremony marked by moments of silence, the reading of names and the laying of wreaths, will honor the victims of Flight 93, the hijacked plane that crashed after crew members and passengers tried to storm the cockpit. That service will be attended by Veterans Affairs Secretary Doug Collins.

Like Lynch, people across the country are also marking the 9/11 anniversary with service projects and charity works as part of a national day of service. Volunteers will be taking part in food and clothing drives, park and neighborhood cleanups, blood banks and other community events.

In all, the attacks by al-Qaida militants killed 2,977 people, including many financial workers at the World Trade Center and firefighters and police officers who had rushed to the burning buildings trying to save lives.

The attacks reverberated globally and altered the course of U.S. policy, both domestically and overseas. It led to the “ Global War on Terrorism ” and the U.S.-led invasions of Afghanistan and Iraq and related conflicts that killed hundreds of thousands of troops and civilians.

While the hijackers died in the attacks, the U.S. government has struggled to conclude its long-running legal case against the man accused of masterminding the plot, Khalid Sheikh Mohammed. The former al-Qaida leader was arrested in Pakistan in 2003 and later taken to a U.S. military base at Guantánamo Bay, Cuba, but has never received a trial.

The anniversary ceremony in New York was taking place at the National Sept. 11 memorial and Museum, where two memorial pools ringed by waterfalls and parapets inscribed with the names of the dead mark the spots where the twin towers once stood.

The Trump administration has been contemplating ways that the federal government might take control of the memorial plaza and its underground museum, which are now run by a public charity currently chaired by former New York City Mayor Michael Bloomberg, a frequent Trump critic. Trump has spoken of possibly making the site a national monument.

In the years since the attacks, the U.S. government has spent billions of dollars providing health care and compensation to tens of thousands of people who were exposed to the toxic dust that billowed over parts of Manhattan when the twin towers collapsed. More than 140,000 people are still enrolled in monitoring programs intended to identify those with health conditions that could potentially be linked to hazardous materials in the soot.

Associated Press reporters Michael Hill in Albany, New York, and Darlene Superville in Washington contributed to this story.

Copyright 2025 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.