 Well, KRDO had a chance to follow what may be the toughest time of all for the class of 2028 at the U.S. Air Force Academy. New cadets at the academy are in their second phase of basic training. They marched more than five miles to Jack's Valley on the academy grounds. Commandant and Brigadier General Gavin Marks say they learned skills like land navigation, first aid, and how to protect themselves when attacked.