Mass Casualty Exercise U.S. Air Force firefighters pull a simulated patient from a vehicle during a mass casualty exercise on Al Udeid Air Base, Qatar, Dec. 15, 2015. The firefighters are assigned to the 379th Air Expeditionary Civil Engineer Squadron. U.S. Air Force photo by Master Sgt. Joshua Strang SHARE IMAGE: Download Image: Full Size (0.78 MB) Photo By: Master Sgt. Joshua Strang VIRIN: 151215-D-HV319-169.JPG Photo Gallery