Capt. Corey Green, from the 90th Operations Support Squadron, explains to a visiting internship group about the different launch stages of the Minuteman III ICBM, June 4, 2021, at the Missile Procedure Trainer on F.E. Warren Air Force Base, Wyoming. Ten cadets and midshipmen from the U.S. Military Academy, the U.S. Naval Academy and the U.S. Air Force Academy visited F.E. Warren as part of an internship with the Defense Threat Reduction Agency. The DTRA internship visit was organized to help the future officers learn about the nuclear deterrence mission, and was the first of its kind organized between the different entities. (U. S. Air Force photo by Glenn S. Robertson)