Secretary of the Air Force Barbara M. Barrett, left, Air Force Chief of Staff David L. Goldfein and Mrs. Dawn Goldfein pose with a representation of an etching that is now displayed on the Wall of Valor at the Air Force Memorial during a ceremony at Joint Base Anacostia-Bolling, Washington, D.C., July 31, 2020. The ceremony unveiled a new etching for the memorial's Wall of Valor at the Air Force Memorial that reads, "This is our sacred duty. When protecting Soldiers, Sailors, Airmen and Marines, we fly to the sound of the guns … or we die trying." (U.S. Air Force photo by Wayne Clark)