U.S. Air Force joint terminal attack controllers with the 22nd Special Tactics Squadron out of McChord Air Force Base, Tacoma, Wash., direct the action of combat and rescue aircraft engaged in close air support and rescue operations over the desert surrounding Davis-Monthan Air Force Base, Tucson, Ariz., April 16, 2010, during Angel Thunder 2010. Angel Thunder, an Air Combat Command-sponsored exercise, is the largest personnel recovery/combat search and rescue exercise to date combining Department of Defense (DoD) and non-DoD assets. (U.S. Air Force photo by Staff Sgt. Joshua L. DeMotts/Released)

A U.S. Air Force HH-60 Pave Hawk aircraft with the 305th Rescue Squadron out of Davis-Monthan Air Force Base (AFB), Tucson, Ariz., and two Royal Netherlands Air Force AH-64D Apache aircraft fly over the desert surrounding Davis-Monthan AFB, Tucson, Ariz., April 16, 2010, during Angel Thunder 10. The Air Combat Command-sponsored exercise is the largest personnel recovery/combat search and rescue exercise to date and combines Department of Defense (DoD) and non-DoD assets. (U.S. Air Force photo by Staff Sgt. Joshua L. DeMotts/Released)

A U.S. Air Force HH-60 Pave Hawk helicopter with the 210th Rescue Squadron (RQS) out of Kulis Air National Guard Base in Anchorage, Alaska, drops off pararescumen from the 103rd RQS, New York Air National Guard, and three survivors in the desert surrounding Davis-Monthan Air Force Base in Tucson, Ariz., April 15, 2010, during Angel Thunder 2010. Angel Thunder, an Air Combat Command-sponsored exercise, is the largest personnel recovery/combat search and rescue exercise to date and combines Department of Defense (DoD) and non-DoD assets. (U.S. Air Force photo by Staff Sgt. Joshua L. DeMotts/Released)

Pararescuemen from the 304th Rescue Squadron out of Portland, OR arrive to provide backup support during a mass casualty exercise at an urban training facility in Playas, NM 18 July as part of exercise Angel Thunder. Angel Thunder is a Combat Search and Rescue exercise designed to provide realistic CSAR Task Force training that tests theater spin-up capabilities and examines the integration of all Air Force assets in mission planning procedures and mission execution.(U.S. Air Force photo/Senior Airman Christina D. Ponte)

A U.S. Air Force HH-60G Pave Hawk helicopter from Davis-Monthan Air Force Base, Ariz., refuels near the base during Angel Thunder 2010 April 16, 2010. Angel Thunder is a joint service, multinational, interagency combat search and rescue exercise that provides realistic training to Air Force personnel recovery assets using a variety of scenarios to simulate deployment conditions, contingencies and natural disasters. (U.S. Air Force photo by Staff Sgt. Alesia Goosic/Released)

U.S. Air Force Senior Airman Brendan Patterson shoots a rocket propelled grenade to simulate an attack on a convoy during a mass casualty exercise at an urban training facility in Playas, N.M., July 18, 2007, as part of Exercise Angel Thunder. The exercise is a combat search and rescue task force exercise designed to test theater spin-up capabilities and examine the integration of all Air Force assets in mission planning procedures and mission execution. Patterson is a pararescueman assigned to the 48th Rescue Squadron out of Davis-Monthan Air Force Base. (U.S. Air Force photo by Senior Airman Christina D. Ponte)