Tight Clench An Air Force cadet trainee from the class of 2029 participates in an assault course during the second phase of basic training at the Jacks Valley complex of the U.S. Air Force Academy in Colorado Springs, Colo., July 15, 2025. The second training phase is designed to push cadets to their physical limits to build self-confidence, teamwork and tactical skills. SHARE: Download: Full Size (1.35 MB) Tags: air force, training Credit: Ray Bahner, Air Force VIRIN: 250715-F-HI801-1050P.JPG Photo Gallery