1200px-Structural_burn_training_facility_at_Dover_Air_Force_Base

Senior Airman Daniel Kolk, 436th Civil Engineer Squadron driver operator, extinguishes flames in a controlled exercise at the structural burn training facility April 26, 2019, at Dover Air Force Base, Del. The firefighters train in a controlled environment while being monitored by other Dover firefighting professionals. (U.S. Air Force photo by Senior Airman Christopher Quail)