Tech Sgt. Lance Bollenberg, 28th Security Forces Squadron noncommissioned officer in-charge of physical security, shoots an M320 grenade launcher during a course in preparation for the 2021 Global Strike Challenge Ellsworth Air Force Base, S.D, Aug. 23, 2021.The competition is designed to promote lethality, teamwork, and mission pride among Air Force Global Strike Command, Air Combat Command, Air Force Reserve Command, and the Air National Guard. (U.S. Air Force photo by Senior Airman Alexi Bosarge)