Player Embed Code: Download Embed Share Trump, Defense Leaders Mark 9/11 Anniversary Defense.gov Sept. 11, 2019 | 01:24:48 President Donald J. Trump, Defense Secretary Dr. Mark T. Esper and Chairman of the Joint Chiefs of Staff Marine Corps Gen. Joe Dunford honor those who died in the 9/11 terrorist attack in a ceremony at the 9/11 Pentagon Memorial in Washington, Sept. 11, 2019.