HURLBURT FIELD, Fla. -- An instructor directs students from the 720th Special Tactics Training Squadron to enter a smaller inner circle as they speed by during a beginner level dirt bike course here, March 31. By redirecting the flow of bikes, the instructors test the student's ability to keep their eyes forward and ready for any sudden change in direction. (U.S. Air Force photo/ Senior Airman Julianne Showalter)(RELEASED)