Col. Scott Fox, 20th Air Force vice commander, passes the 620th Ground Combat Training Squadron guidon to Capt. Clifford Piernick as he assumes command of the squadron during a change of command ceremony in Guernsey, Wyo., May 20, 2014. The 620th GCTS, part of the 20th Air Force, trains missile wing security forces in the protection and safe keeping of the nation’s ICBM resources. (U.S. Air Force photo by R.J. Oriez)