An F-15 Eagle crew chief prepares the jet for taxing. An F-15 Eagle crew chief prepares the jet for taxing during preflight operations at Eielson Air Force Base, Alaska, during Exercise Cope Thunder 05-1 on May 5, 2005. Cope Thunder is a joint/combined air training exercise providing 8-10 sorties per pilot simulating combat. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 366790-W-QXQ24-019.jpg Photo Gallery