9/11 Remembrance President Donald J. Trump speaks during the 9/11 Observance Ceremony at the Pentagon, Sept. 11, 2017. To his left is First Lady Melania Trump, and to his right are Defense Secretary Jim Mattis and Marine Gen. Joe Dunford, chairman of the Joint Chiefs of Staff. DoD photo by Air Force Tech. Sgt. Brigitte N. Brantley SHARE: Download: Full Size (1.33 MB) Credit: Brigitte N. Brantley VIRIN: 170911-D-IP333-0194.JPG Photo Gallery