Senior Airman Mahonri Gibson prepares to don a full-faced scuba mask during a subsurface search and recovery exercise Oct. 20, 2010, at Stanford Training Area, England. Airman Gibson is a pararescueman with the 56th Rescue Squadron. He is equipped with recovery dive equipment which includes a buoyancy compensator, a primary air source, a secondary emergency air source, a cold water regulator system and an exposure dry suit. (U.S. Air Force photo/Airman 1st Class Lausanne Morgan)