Col. Gary Brewer, 161st Air Refueling Wing commander, leads a formation during the first-ever Arizona National Guard Muster, Dec. 7, 2014, at Sun Devil Stadium in Phoenix. Brewer, the 13th officer to lead Arizona's KC-135 Stratotanker unit, will retire from the Air Force Dec. 5 after 26 years of service. (U.S. Air National Guard photo by Tech. Sgt. Courtney Enos)