15th Anniversary 9/11 Memorial Service
Members from the Dover Air Force Base Honor Guard, 436th Security Forces Squadron and firefighters from the 436th Civil Engineer Squadron march during the 15th Anniversary 9/11 Memorial Service Sept. 11, 2016, at the Air Mobility Command Museum on Dover AFB, Del. The 9/11 Memorial at the museum includes two pieces of steel from the World Trade Center, a rock from the United Airlines Flight 93 crash site and a block from the damaged portion of the Pentagon. (U.S. Air Force photo by Senior Airman William Johnson)

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Photo by: Senior Airman William Johnson |  VIRIN: 160911-F-PT194-1020.JPG