Airman 1st Class Ian McAlister, an F-15 avionics apprentice with the 365th Training Squadron, continues his education on a mockup of an E-model avionics trainer. Airman McAlister is the first ACE student for the Sheppard's F-15 course in nearly four years, scoring 100% on all of his block tests. (U.S. Air Force/SSgt Tonnette Thompson)