A member from the 28th Aircraft Maintenance Squadron and a crew member discuss preflight checks before launching B-1B Lancers from Ellsworth Air Force Base, S.D., Oct. 24, 2019. The deployment of this aircraft allows militaries from the United States and regional partner nations to train and work together to strengthen military-to-military relationships, promote regional security, improve combined tactical air operations and enhance interoperability of forces. The Department of Defense maintains command and control of its bomber force for any mission, anywhere in the world, at any time. (U.S. Air Force photo by Tech. Sgt. Jette Carr)