Mark Howell, 7th Bomb Wing historian, briefs Airmen from the 9th Bomb Squadron on the history of the squadron at Dyess Air Force Base, Texas, Sept. 8, 2017. Howell gave the brief as part of the 100th anniversary celebration of the 9th BS, 28th BS and the 436th Training Squadron. (U.S. Air Force photo by Senior Airman Austin Mayfield)