Airman Rendon McClain, 364th Training Squadron hydraulic systems apprentice course student, tightens the connection of two hydraulic hoses on a C-130 ground instruction training aircraft at Sheppard Air Force Base, Texas, Dec. 20, 2018. McClain, a native of Houston, made perfect scores on exams during the 49-day course to earn the distinction of being an ACE student. (U.S. Air Force photo by John Ingle)