US President Donald Trump and other officials have paid tribute to slain right-wing activist Charlie Kirk as the country marked the 24th anniversary of the September 11, 2001 attacks.
Kirk was a "giant of his generation," and a "champion of liberty," Trump said on Thursday at the beginning of his remarks during a 9/11 ceremony at the Pentagon, which was one of the targets of the Al-Qaeda attacks that sparked two decades of deadly conflict.
The US president announced that he would soon posthumously award Kirk the Presidential Medal of Freedom — the country's highest civilian honour.
Trump said those who attack America that "we will hunt you down."
"If you attack the United States of America, we will hunt you down and we will find you. We will crush you without mercy, and we will triumph without question," Trump added.
Speaking at the same ceremony, Secretary of War Pete Hegseth said that "like those on 9/11, you will never be forgotten."
Kirk — a close ally of Trump — was shot in the neck while speaking at an event at Utah Valley University on Wednesday.
Vice President JD Vance cancelled a trip to New York for 9/11 commemorations so he could travel to Utah to visit with Kirk's grieving family.
Memorial events for 9/11 were held at Ground Zero in Manhattan, where the World Trade Center's twin towers were destroyed in coordinated attacks that also saw a jetliner crash into the Pentagon.
Another jet, Flight 93, crashed into the Pennsylvania countryside when passengers overran the hijacker and took control of the aircraft.
'Same hate'
Several mayoral candidates took part in commemorations in New York that marked a brief respite from a bitter battle to be the city's next leader.
Two days ago, former governor and independent candidate Andrew Cuomo criticised his Democratic rival Zohran Mamdani for giving an interview to a left-wing streamer who had said in 2019 that the United States deserved 9/11, saying it shows he does not deserve to be mayor.
Mamdani's campaign hit back that "to suggest that Zohran Mamdani — who is poised to become New York's first Muslim mayor — somehow supported 9/11" is "vile" and "dangerous."
Mamdani holds a 22 point lead in the race, according to the latest polling from The New York Times and Siena.
Incumbent Mayor Eric Adams tied the killing of Kirk with 9/11 on Thursday, saying: "It's the same hate that drove two planes into the World Trade Center that drove a bullet through the neck of Charlie Kirk."
"That assassination cut at the heart of what we are as Americans," Adams said.
"If we don't pause for a moment on 9/11 to state that we're better than that as Americans, we're better than that as human beings, then we're going to find ourselves in a dark place."
New York marked a citywide moment of silence at 8:46 am (1246 GMT), the time that hijacked Flight 11 struck the North Tower of the World Trade Center.
Places of worship across the city then sounded their bells to mark the impact as families of the victims read the names of those killed at ground zero.
The official death toll was 2,977 including the passengers and crew of the four hijacked planes, victims in the twin towers, firefighters, and personnel at the Pentagon. The death toll excludes the 19 Al-Qaeda hijackers.
The FBI said it is offering a reward of up to $100,000 for information leading to the identification and arrest of whoever is responsible for Kirk's death.
Anyone with information is asked to call 1-800-CALL-FBI. Officials also published the link for a form where people can upload videos and photos.
Earlier on Thursday, law enforcement officials disseminated two photos, seeking the public’s help in identifying the "person of interest."
