1. It was a somber day as Americans commemorated the 17th anniversary of the Sept. 11 terrorist attacks.

President Trump visited Shanksville, Pa., to honor the heroes who brought down United Airlines Flight 93 in an field rather than allow it to be used as a weapon.

“We remember the moment when America fought back,” he said.

Ceremonies were also held in New York and at the Pentagon. Vice President Mike Pence and Defense Secretary Jim Mattis led the ceremony at the Pentagon.