U.S. Air Force Tech. Sgt. Andrew Briggs protects his head from the intense heat generated by the engines of an Air Force C-130 Hercules cargo aircraft engine running during an aeromedical evacuation mission Sept. 7, 2011, at Al Asad Air Base, Iraq. Briggs is a loadmaster assigned to the 737th Expeditionary Airlift Squadron. U.S. Air Force photo by Master Sgt Jeffrey Allen.