NEW YORK (AP) — Nearly a quarter century has passed since the Sept. 11, 2001, attacks, but for many, the emotions of the day remain raw as ever.

On Thursday, America marked the 24th anniversary of the deadly attacks with solemn ceremonies in New York, at the Pentagon and in Shanksville, Pennsylvania. The commemorations were punctuated by moments of silence, the tolling of bells and the reading of the names of the nearly 3,000 killed.

“Even 24 years later, it’s heart-wrenching,” said Jennifer Nilsen, who wore a T-shirt emblazoned with an image of her husband, Troy Nilsen, as she attended the commemoration at ground zero in lower Manhattan. “It feels the same way every year.”

Michelle Pizzo, wearing a shirt with the image of her late husband, Jason DeFazio, said she hoped more people could take a minute to reflect on the day.

“Younger kids don’t realize that you have to remember,” she said.

Emma Williamson, 20, of Massachusetts, made a point to travel from her college uptown to stand near ground zero, 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.

“I wasn’t born when it happened, but it was really an important day in America,” she said. “It’s kind of the last time we all stuck together, and that matters.”

The reading of names and moments of silence

The 9/11 anniversary, often promoted as a day of national unity, came during a time of increased politician tension.

The assassination of conservative activist Charlie Kirk at a Utah college a day earlier prompted additional security measures at ground zero, where FBI Director Kash Patel was among the dignitaries in attendance.

Vice President JD Vance and his wife, second lady Usha Vance, had planned to attend but instead flew to Salt Lake City to visit with Kirk’s family. Kirk’s casket was then taken to his home state of Arizona aboard Air Force Two.

Many in the crowd at ground zero held up photos of lost loved ones as a moment of silence marked the exact time when the first hijacked plane struck the iconic twin towers.

Loved ones then read aloud the names of the victims, with many giving personal remembrances, well wishes and updates on their lives.

Zoe Doyle, daughter of Frank Joseph Doyle, said her family created a nonprofit in his honor that’s built schools in South Africa and is feeding and educating thousands of children.

Manuel DaMota Jr. said he remembers his father and namesake, Manuel DaMota, not just with grief, but with gratitude for the example he set.

“In a world filled with division and conflict, I do my best to honor my father by choosing connection, empathy and hope,” he said.

Melissa Pullis, whose husband Edward Pullis died in the towers, said this year is more difficult than others because two of the couple’s three children are getting married.

“You can’t walk your princess down the aisle,” she said through tears. “You are missed every day. We will always say your name, and we will always fight for justice.”

Ceremonies in Virginia and Pennsylvania honor victims

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 were honored in a ceremony attended by President Donald Trump and first lady Melania Trump.

The president, in his remarks, recounted moments from that day, including snippets of conversations from passengers who were aboard the hijacked airplanes.

“Today, as one nation, we renew our sacred vow that we will never forget Sept. 11, 2001,” Trump said during the observance, which took place in an internal courtyard of the building rather than its traditional location outside its walls near the building’s 9/11 memorial.

“The enemy will always fail,” he added. “We defy the fear, endure the flames.”

The president, who attended a New York Yankees game in the Bronx on Thursday evening, also announced Kirk would be posthumously awarded the Presidential Medal of Freedom, calling him a “giant of his generation” and a “champion of liberty.”

And in a rural field near Shanksville, Pennsylvania, a ceremony attended by Veterans Affairs Secretary Doug Collins honored the victims of Flight 93, the hijacked plane that crashed after crew members and passengers tried to storm the cockpit.

Elsewhere, people marked the anniversary with service projects and charitable works as part of a national day of service. Volunteers took part in food and clothing drives, park and neighborhood cleanups, blood banks and other community events.

Reverberations from attacks persist

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, altering the course of U.S. foreign and domestic policy. 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 civilians and troops.

The U.S. government has also 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.

While the hijackers died in the attacks, federal officials have struggled to conclude the long-running legal case against the man accused of masterminding the plot, Khalid Sheikh Mohammed. The former al-Qaida leader was arrested in 2003, but has never received a trial.

The Trump administration has also acknowledged its considering ways to take control of the ground zero memorial plaza and its underground museum, which are run by a public charity.

OREM, Utah (AP) — Charlie Kirk, a conservative activist and close ally of President Donald Trump who played an influential role in rallying young Republican voters, was shot and killed Wednesday at a Utah college event in what the governor called a political assassination carried out from a rooftop.

“This is a dark day for our state. It’s a tragic day for our nation,” said Utah Gov. Spencer Cox. “I want to be very clear this is a political assassination.”

No suspect was in custody late Wednesday, though authorities were searching for a new person of interest, according to a law enforcement official familiar with the matter who was not authorized to discuss the situation by name and spoke on condition of anonymity. Two people were detained earlier in the day but neither was determined to have had any connection to the shooting and both have been released, Utah public safety officials said.

Authorities did not immediately identify a motive but the circumstances of the shooting drew renewed attention to an escalating threat of political violence in the United States that in the last several years has cut across the ideological spectrum. The assassination drew bipartisan condemnation, but a national reckoning over ways to prevent political grievances from manifesting as deadly violence seemed elusive.

Videos posted to social media from Utah Valley University show Kirk speaking into a handheld microphone while sitting under a white tent emblazoned with the slogans “The American Comeback” and “Prove Me Wrong.” A single shot rings out and Kirk can be seen reaching up with his right hand as a large volume of blood gushes from the left side of his neck. Stunned spectators are heard gasping and screaming before people start to run away. The Associated Press was able to confirm the videos were taken at Sorensen Center courtyard on the Utah Valley University campus.

Kirk was speaking at a debate hosted by his nonprofit political organization. Immediately before the shooting, Kirk was taking questions from an audience member about mass shootings and gun violence.

“Do you know how many transgender Americans have been mass shooters over the last 10 years?” the person asked. Kirk responded, “Too many.”

The questioner followed up: “Do you know how many mass shooters there have been in America over the last 10 years?”

“Counting or not counting gang violence?” Kirk asked.

Then a single shot rang out. The shooter, who Cox pledged would be held accountable in a state with the death penalty, wore dark clothing and fired from a building roof some distance away to the courtyard where the event took place.

Some 3,000 people were in attendance, according to a statement from the Utah Department of Public Safety, which also said the university police department had six officers working the event along with Kirk’s own security detail.

The death was announced on social media by Trump, who praised the 31-year-old Kirk, the co-founder and CEO of the youth organization Turning Point USA, as “Great, and even Legendary.” Later Wednesday, he released a recorded video from the White House in which he called Kirk a “martyr for truth and freedom” and blamed the rhetoric of the “radical left” for the killing.

Utah Valley University said the campus was immediately evacuated and remained closed. Classes were canceled until further notice. Those still on campus were asked to stay in place until police officers could safely escort them off campus. Armed officers walked around the neighborhood bordering the campus, knocking on doors and asking for information on the shooter.

Officers were seen looking at a photo on their phones and showing it to people to see if they recognized a person of interest.

The event, billed as the first stop on Kirk’s “The American Comeback Tour,” had generated a polarizing campus reaction. An online petition calling for university administrators to bar Kirk from appearing received nearly 1,000 signatures. The university issued a statement last week citing First Amendment rights and affirming its “commitment to free speech, intellectual inquiry, and constructive dialogue.”

Last week, Kirk posted on X images of news clips showing his visit was sparking controversy. He wrote, “What’s going on in Utah?”

The shooting drew swift condemnation across the political aisle as Democratic officials joined Trump, who ordered flags lowered to half-staff and issued a presidential proclamation, and Republican allies of Kirk in decrying the violence.

“The attack on Charlie Kirk is disgusting, vile, and reprehensible,” Democratic California Gov. Gavin Newsom, who last March hosted Kirk on his podcast, posted on X.

“The murder of Charlie Kirk breaks my heart. My deepest sympathies are with his wife, two young children, and friends,” said Gabrielle Giffords, the former Democratic congresswoman who was wounded in a 2011 shooting in her Arizona district.

The shooting appeared poised to become part of a spike of political violence that has touched a range of ideologies and representatives of both major parties. The attacks include the assassination of a Minnesota state lawmaker and her husband at their house in June, the firebombing of a Colorado parade to demand Hamas release hostages, and a fire set at the house of Pennsylvania’s governor, who is Jewish, in April. The most notorious of these events is the shooting of Trump during a campaign rally last year.

Former Utah congressman Jason Chaffetz, a Republican who was at Wednesday’s event, said in an interview on Fox News Channel that he heard one shot and saw Kirk go back.

“It seemed like it was a close shot,” Chaffetz said, who seemed shaken as he spoke.

He said there was a light police presence at the event and Kirk had some security but not enough.

“Utah is one of the safest places on the planet,” he said. “And so we just don’t have these types of things.”

Turning Point was founded in suburban Chicago in 2012 by Kirk, then 18, and William Montgomery, a tea party activist, to proselytize on college campuses for low taxes and limited government. It was not an immediate success.

But Kirk’s zeal for confronting liberals in academia eventually won over an influential set of conservative financiers.

Despite early misgivings, Turning Point enthusiastically backed Trump after he clinched the GOP nomination in 2016. Kirk served as a personal aide to Donald Trump Jr., the president’s eldest son, during the general election campaign.

Soon, Kirk was a regular presence on cable TV, where he leaned into the culture wars and heaped praise on the then-president. Trump and his son were equally effusive and often spoke at Turning Point conferences.