U.S. Air Force Col. David Herder, 153rd Airlift Wing vice commander, passes a guidon to Lt. Col. Daniel Perala, incoming 153rd Medical Group commander, during a change of command ceremony, Sept. 10, 2016, in Cheyenne, Wyoming. Col. Jeffrey Storey (right) is the outgoing commander and will continue working as a flight surgeon for the 153rd Medical Group. Perala was the former Medical Group vice commander for more than five years. (U.S. Air National Guard photo by Master Sgt. Leisa Grant)