Col. Gregg Hesterman, the 178th Wing commander, assumes his new leadership position during a change of command ceremony at Springfield Air National Guard Base in Springfield, Ohio, Nov. 4, 2017. Maj. Gen. Stephen Markovich, the Ohio National Guard Commander for Air, passed the guidon to Hesterman. Col. John Knabel relinquished command and retired after 29 years of military service. (U.S. Air National Guard photo by Senior Airman Rachel Simones)