A F-16C Fighting Falcon taxis out for a sortie during

A F-16C Fighting Falcon taxis out for a sortie during Amalgam Dart 20-4 live-fly training exercise at McGhee Tyson Air National Guard Base, Tenn., Nov. 20, 2019. Amalgam Dart 20-4 is a North American Aerospace Defense Command live-fly exercise designed to test NORAD's ability to deploy its Integrated Air Defense System (IADS) and execute its aerospace warning and aerospace control missions at a non-designated air control alert facility. The training scenario replicated
airborne intercepts of aircraft that violated temporary flight restricted airspace over the greater Knoxville, Tenn. Area. For more than 60 years, NORAD aircraft have identified and intercepted potential air threats to North America in the execution of the command's aerospace warning and aerospace control missions. (Air National Guard photo by Senior Master Sgt. Craig Clapper)