"But in its place has grown a new reminder to live our lives with the same courage as the heroes of Flight 93". He says the fallen "took control of their destiny and changed the course of history".
Pence spoke Tuesday at the Pentagon Memorial.
The terrorists "hoped to break our spirit, and they failed", he said.
Today, 9/11, is a day of reflection for Americans - and especially New Yorkers.
Debra Sinodinos, who lost her firefighter cousin Peter Carroll and works near the trade centre, said she tries not to let the recent attacks unnerve her.
Meanwhile, Vice President Mike Pence is reportedly at the Pentagon, where a plane crashed directly into the building.
In remembrance, Trump also posted "17 years since September 11th!"
"We grieve together for every mother and father, sister and brother, son and daughter, who was stolen from us at the Twin Towers, the Pentagon and here in this Pennsylvania field", Trump said.
Flight 93 was the fourth plane.
Trump remembered the almost 3,000 people killed in the attacks on the World Trade Center, the Pentagon and aboard Flight 93, which went down in Shanksville.
The 9/11 commemoration has become an annual event for presidents since President George W. Bush grabbed a bullhorn to speak to workers in the rubble of the destroyed World Trade Center.
The ceremony on Tuesday to commemorate the 17th anniversary included moments of silence and tolling bells.
The names are read by victims' loved ones, some of them not yet born when the attacks happened.
Today marks the 17th anniversary of September 11th, a day when almost 3,000 people died and 6,000 were injured following a terror attack on the World Trade Center.
Three other hijacked planes were crashed into the World Trade Center in NY and the Pentagon.
In Shanksville, Pa., at the site of the crash of Flight 93, the "Tower of Voices" remembers the 40 passengers and crew who heroically thwarted their hijackers' plans. Organizers of the ground zero ceremony allow politicians to attend, but they've been barred since 2011 from reading names or delivering remarks. "The terrorists who carried out these attacks sought not just to take the lives of our people and crumble buildings", he said.
"I watched when the World Trade Center came tumbling down". She calls the progress "amazing".
The date of September 11th is one that has carried deep significance for the American public, and countless citizens across the world for over a decade.
And he greeted crowds with a double fist pump - sparking a huge backlash online.
A "Tower of voices" (Tower of Voices), a monument of almost 30 meters high erected in honor of the victims, has just been inaugurated in the middle of these hills, which are dotted in the distance of wind turbines.
Almost 3,000 people died when hijackers flew jet planes into the World Trade Center in NY and the Pentagon in Northern Virginia.
Since the last anniversary, a truck attack on a nearby bike that killed eight people. "And now it's the tallest", he said at the time.