The sun sets on the National Harbor, Oxon Hill, Md., during a "Warbirds" flight Sept. 21, 2016. The flight was part of the dress rehearsal for the 2016 Air Force Tattoo scheduled to be held at Joint Base Anacostia-Bolling, Washington, D.C., Sept. 22. The formation includeds a B-25 Mitchell and a P-51 Mustang. (U.S. Air Force photo by Airman 1st Class Rustie Kramer)