Airman 1st Class Tanner Nelson, 361st Training Squadron turbo propulsion apprentice course student, explains how he is using electronic training instructions to ensure he covers every step in the maintenance process to Maj. Gen Timothy Leahy, 2nd Air Force commander at Sheppard Air Force Base, Texas, Oct. 31. Nelson is in block six of nine in the turbo propulsion course. (U.S. Air Force photo by Alan Quevy)