Staff Sgt. David Trosper moves an AIM-7M Sparrow missile into position. U.S. Air Force Staff Sgt. David Trosper moves an AIM-7M Sparrow missile into position on a weapons loader during a weapon systems evaluation program at Tyndall Air Force Base, Fla., on May 9, 2006. Trosper is assigned as a weapons load team chief with the 493rd Aircraft Maintenance Unit. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 458853-U-WTL55-891.jpg Photo Gallery