GS Challenge SFS
Members of the 28th Security Forces Squadron from Ellsworth Air Force Base, S.D., receive a briefing before competing in the M4 competition during Global Strike Challenge at Fort Polk, La., Nov. 14. The event is the premier bomber, Intercontinental Ballistic Missile and security forces competition with units from Air Force Global Strike Command, Air Combat Command, Air Force Reserve Command and the Air National Guard. (U.S. Air Force photo/Senior Airman Brittany Y. Bateman)