362nd Training Squadron F-15 crew chief apprentice course students close an F-15 Eagle's nose at Sheppard Air Force Base, Texas, Nov. 29, 2018. The nose is a hollow ceramic cover that hides and protects the aircraft's radar system. The students must loosen a series of bolts inside each of those open panels and only then can the nose open. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)