Col. Jane Denton, 319th Medical Group commander, passes the 319th Medical Operations Squadron guidon to Lt. Col. Brett Nishikawa during a change-of-command ceremony July 2, 2013, at Grand Forks Air Force Base, N.D. Nishikawa replaced Lt. Col. Marie Colasanti. (U.S. Air Force photo/ Airman 1st Class Xavier Navarro)