Col. James Katrenak (left), 28th Maintenance Group commander, presents the guidon of the 28th Munitions Squadron to Maj. Christopher Gardner, the new 28th MUNS commander, during a change of command ceremony at Ellsworth Air Force Base, S.D., June 20, 2013. Gardner, who comes to Ellsworth from Kirtland AFB, N.M., will command the 28th MUNS, whose mission is to provide conventional munitions, armament systems and trained munitions personnel to support the 28 combat-coded B-1 aircraft assigned to the 28th Bomb Wing. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)