NORAD 60th Anniversary 5k Tunnel Run
CHEYENNE MOUNTAIN AIR FORCE STATION, Colo. -- Canadian Lt. Gen. Pierre St-Amand, North American Aerospace Defense Command deputy commander, provides opening remarks to runners before the NORAD 60th Anniversary 5k on Cheyenne Mountain Air Force Station, Colo., May 10, 2018. Part of the run included a route through the Cheyenne Mountain Complex, giving the runners an inside look at the mountain-based facility. (U.S. Air Force photo by Senior Airman Dennis Hoffman)