In a visual reminder of United States Air Force heritage, a World War II-era Boeing B-17G Flying Fortress four-engine heavy bomber flies in formation with a Boeing B-52H Stratofortress eight-engine strategic bomber. The B-17 is a Lockheed Vega B-17G-105-VE, 44-85718. This B-52, 60-0054, has been in active service for more than 63 years. (U.S. Air Force photo/Master Sgt. Michael A. Kaplan/0600513-F-0558K-101.JPG)
18 September 1947: The United States Army Air Forces become a separate military service, the United States Air Force.