Airmen attending the Airman Leadership School mark where they and their supervisor fall onto a scale of high professionalism or less professional inside the Samuel O. Turner ALS building at Ellsworth Air Force Base, S.D., Jan. 16, 2018. To be eligible for promotion to staff sergeant, Airman must attend the month-long professional military education course. (U.S. Air Force photo by Airman 1st Class Nicolas Z. Erwin)