WHITEMAN AIR FORCE BASE, Mo. - Staff Sgt. John Burkhart, 131st Bomb Wing, briefs Airmen from the 509th Munitions Squadron on safety procedures prior to beginning a practice session for the Air Force Global Strike Command Challenge July 12. The 509th MUNS team consisted of seven Whiteman AFB Airmen, three of which are guardsmen from the 131st Bomb Wing. (U.S. Air Force Photo)