Retired Air Force Lt. Col. Bill Schwertfeger speaks to students of Air University’s Air Command and Staff College, May 29, 2018, during the annual Gathering of Eagles on Maxwell Air Force Base, Alabama. During his 20 year career, Schwertfeger spent 407 days in captivity as a prisoner of war in Vietnam. (U.S. Air Force photo by William Birchfield)

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Photo by: William Birchfield |  VIRIN: 180530-F-NG836-1220.JPG