Col. Jon Julian, right, incoming 11th Operations Group commander, accepts the 11 OG guidon from Col. Bradley Hoagland, 11th Wing/Joint Base Andrews commander, during the 11 OG change of command ceremony June 23, 2015, at Joint Base Anacostia-Bolling, District of Columbia. The transfer of the unit guidon symbolizes the transfer of authority from one commander to the next. (U.S. Air Force photo by Senior Airman Preston Webb/RELEASED)