Col. Tammy M. Knierim (left), 319th Mission Support Group commander, presents Lt. Col. Mark A. Zimmerhanzel, 319th Civil Engineer Squadron commander, with the Bronze Star Medal Oct. 19 during a commander’s call at Liberty Square on Grand Forks Air Force Base, N.D. Colonel Zimmerhanzel was awarded the Bronze Star for his meritorious achievements while deployed in support of Operation Iraqi Freedom from April 26, 2008, to Nov. 1, 2008, as the 732nd Expeditionary Civil Engineer Squadron commader. (U.S. Air Force photo by Senior Airman Amanda N. Stencil)