Col. Tracey Hayes, 90th Missile Wing commander, and Chief Master Sgt. Samuel Couch, 90th Missile Wing command chief, pose with Airman Leadership School Class 15-D March 25, 2015, on F.E. Warren Air Force Base, Wyo. ALS is a six-week course designed to prepare Airmen to assume supervisory duties as well as instruction in the practice of leadership and followership. Enlisted Airmen must graduate ALS before supervising other Airmen. (U.S. Air Force photo by Airman 1st Class Malcolm Mayfield)