Trump recalled that the actions of the passengers and crew, which brought Flight 93 down in a Somerset County field, "just 20 minutes flying time" from Washington, D.C.
Commemorating the 17th anniversary of the attacks that struck the World Trade Center in NY and the Pentagon in Washington, Trump said the nation shared the grief of the family members whose loved ones were lost that day.
"Now he's seen fist bumping on his way to the field in Shanksville, PA, where 40 people died after a terror attack was thwarted", Chris Riotta chimed in.
Ceremonies are also being held at the 9/11 Memorial plaza on the World Trade Center site in New York City.
People look on during the anniversary commemoration at the Flight 93 National Memorial in Pennsylvania.
Those aboard United Flight 93, told over the phone by their loved ones that two other passengers jets had smashed into New York's World Trade Center, tried to regain control of their aircraft.
It will serve as a way to honor those who became sick or died from exposure to toxins released when the Trade Centers twin towers collapsed.
White House Press Secretary Sarah Huckabee Sanders said the president's focus for the day was "remembering the lives that were lost, and certainly honouring the individuals who were not only lost that day, but also put their lives on the line to help in that process".
Having Trump as president feels like having an abusive stepdad who ruins every function with his ineptitude, except 1000 times worse because his ineptitude is steering one of the most powerful nations in the world.
"Last year, President Trump signed the largest increase in our national defense in a generation", Pence said.
The president also participated in the Pentagon's September 11 observance a year ago. But each year at ground zero, victims relatives infuse the ceremony with personal messages of remembrance, concern and inspiration.
Meanwhile, a subway station destroyed on 9/11 finally reopened Saturday. In June, doors opened at the 80-story 3 World Trade Center, one of several rebuilt office towers that have been constructed or planned at the site.
Seventeen years after losing her husband, Margie Miller went to the New York City ceremony from her home in suburban Baldwin.