Ricardo Suggs, 362nd Training Squadron master instructor, explains to Airman Ameer Hoskins and Airman Robert Goodman, 362nd TRS students, the importance of ensuring all switches are turned off before adding electrical power during aircraft maintenance at Sheppard Air Force Base, Texas, Dec 1, 2017. Hoskins and Goodman are in block five of 10 in the C-130 Hercules crew chief apprentice course and are scheduled to graduate Jan. 29. (U.S. Air Force photo by Alan R. Quevy).