Staff Sgt. Daniel Holmes battles the current as he conducts swift water rescue training U.S. Air Force Staff Sgt. Daniel Holmes battles the current as he conducts swift water rescue training during exercise Angel Thunder 2013 near Davis-Monthan Air Force Base, Ariz., on April 10, 2013. Angel Thunder is a combat search and rescue exercise designed to provide training for recovery personnel in a variety of scenarios to simulate deployment conditions and contingencies. Holmes is attached to the 48th Rescue Squadron. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 783860-R-LEW43-921.jpg Photo Gallery