Capt. William Chase looks out as red smoke from a smoke grenade engulfs his position. U.S. Air Force Capt. William Chase, a pararescueman with the 82nd Expeditionary Rescue Squadron, looks out as red smoke from a smoke grenade engulfs his position during a joint mass casualty exercise near Camp Lemonier, Djibouti, on May 20, 2009. A Guardian Angel team from the unit worked alongside U.S. Marines from the 13th Marine Expeditionary Unit to recover simulated isolated personnel in an austere environment. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 678843-O-OHJ92-848.jpg Photo Gallery