A congratulatory poster hangs on the door of Staff Sgt. Alex Larson’s office, 90th Medical Operations Squadron flight and operations medicine technician, June 1, 2016, in the medical treatment facility at F.E. Warren Air Force Base, Wyo. Larson was selected to become an officer in his first-choice career field of nuclear missile operations. (U.S. Air Force photo by Senior Airman Jason Wiese)