An Air Force Academy cadet trainee attacks the mud pit. An Air Force Academy cadet trainee attacks the mud pit on the Jacks Valley obstacle course during a field training exercise at the U.S. Air Force Academy in Colorado on July 18, 2007. The cadets are beginning two weeks of training that will test their stamina and determination. The training will include M-16 weapons training, confidence and bayonet assault training, drill evaluations, tent inspections and aerobic and physical fitness tests. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 613361-Q-AJQ50-088.jpg Photo Gallery