A B-29 Superfortress, nicknamed Doc, flies over the U.S. Air Force Tattoo at Joint Base Anacostia-Bolling, Washington, D.C., Sept. 13, 2017. The tattoo featured aerial performances from the U.S. Air Force Thunderbirds, Experimental Aircraft Association Warbirds of America, and heritage flight. (U.S. Air Force photo by Airman 1st Class Valentina Lopez)