Two Air Force pararescuemen depart from a HH-60 Pavehawk helicopter to aid casualties during Exercise Angel Thunder 2008. More than 800 ground recovery personnel took part in Angel Thunder '08, the world's largest personnel recovery and combat search and rescue exercise. Angel Thunder 2010 is scheduled for April 12 through 23 at Davis-Monthan Air Force Base, Ariz. (U.S. Air Force photo/Senior Airman Noah R. Johnson)