An American flag, unfurled at dawn, hangs over the Pentagon on the anniversary of the 9/11 attacks, Washington, D.C., Sept. 11, 2019. Officials at Hanscom Air Force Base, Mass., will host a wreath-laying observance with remarks Sept. 10 beginning at 8:30 a.m. to remember the 20th anniversary of 9/11. (DoD photo by Lisa Ferdinando)