Participants in exercise Global Thunder respond to a simulated chemical, biological, radiological, nuclear and high–yield explosive emergency at Kirtland Air Force Base, N.M., Oct. 24, 2019. Global Thunder is an annual command and control exercise that provides training opportunities for all of U.S. Strategic Command’s mission areas, tests joint and field training operations, and has a specific focus on nuclear readiness. (U.S. Air Force photo by Airman 1st Class Austin J. Prisbrey)