Airman 1st Class Josue Perez, a 364th Training Squadron aircraft hydraulic systems apprentice course student, performs a dynamic circuit test on a T-38 Talon landing gear actuator on a nonportable hydraulic test stand during training at Sheppard Air Force Base, Texas, Dec. 4, 2018. Perez finished the 49-academic-day course with perfect scoring, garnering recognition as an ACE student. (U.S. Air Force photo/contributed)