CANNON SPRAY U.S. Air Force Senior Airman Chad Engman and Airman 1st Class Abe Barragnon operate a water cannon at an undisclosed air base in Southwest Asia, Dec. 1, 2008. Engman and Barragnon are firefighters assigned to the 379th Expeditionary Civil Engineer Squadron. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 830342-B-ZCD44-646.jpg Photo Gallery