Air Force Basic Military Training trainee Nicholas Warila low crawls through an obstacle course July 27, 2011, at Lackland Air Force Base, Texas, during the Creating Leaders, Airman and Warriors course. CLAW is a three-hour, mission-oriented exercise designed to test teamwork, leadership skills and the ability to perform under pressure. Warila is assigned to the 322nd Training Squadron. US Air Force photo by Senior Airman Marleah Miller.