Airman 1st Class Jairo Herrera, left, Airman Skyler Biggins, front, and Airman Evan Pohorlyo, 362nd Training Squadron F-15 crew chief apprentice course students, get ready to end the day at Sheppard Air Force Base, Texas, March 12, 2019. The F-15 maintenance course is usually 69 academic days of training before the students are sent off to their operational base to complete their apprentice level with on the job training. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)