US President Donald Trump has paid tribute to the victims who died of 9/11 terrorist attacks, marking the act of violence on its 17th anniversary.
Visiting a memorial in Pennsylvania, Mr Trump delivered a speech to commemorate the attack where passengers are believed to have fought the attackers.
The president spoke at the newly inaugurated Tower of Voices memorial, a 28 metre structure with 40 wind chimes, claiming the nation would always stand up to terrorism.
“America’s future is not written by our enemies,” Mr Trump said in Shanksville.
“America’s future is written by our heroes.”
“As long as this monument stands, as long as this memorial endures, brave patriots will rise up in America’s hours of need and they, too, will fight back.
The memorial marked September 11, 2001, when hijackers flew planes into the World Trade Centre in New York City and the Pentagon in Arlington Virginia.
Another plane crashed in a field in Shanksville, Pennsylvania, believed to have been aimed at the US Congress or White House in Washington DC before it went down.
All 40 people aboard were killed in the crash.
All three attacks have been regarded as the deadliest foreign attack ever on US soil, killing 2,996 people.
Mr Trump praised the passengers for the “moment they fought back.”
“A band of brave patriots turned the tide on our nation’s enemies and joined the immortal rank of American heroes,” he said.
Meanwhile, Vice-President Mike Pence said while attending the Pentagon vigil that Americans “must learn the lessons of 9/11 and remain ever vigilant”.
The ceremony in New York was marked by relatives of victims, who read out the names of the dead while moments of silence were observed at 8:46am and 9:03am to mark the moments two passenger jets struck the two skyscrapers.
It was attended by New York Governor Andrew Cuomo, US ambassador to the United Nations Nikki Haley and Mayor Bill de Blasio, along with his predecessors Michael Bloomberg and Rudy Giuliani.
Meanwhile, Mr Trump said he lost “hundreds of friends” in the New York City attack.
He did not provide any names, but mentioned a Roman Catholic priest who died while serving as a chaplain to the fire department.