More than 75,000 Denver Bronco football fans experienced more than just the usual pre-game festivities during the October 12, 2008 home game against the Jacksonville Jaguars at Invesco Field at Mile High in Denver, Colo. The fans became honorary witnesses to the Air Force Reserve’s mass enlistment ceremony of its newest Citizen Airmen. (U.S. Air Force photo/ Tech. Sgt. Daniel Butterfield)