Staff. Sgt. Mark T. Lennox, 363rd Training Squadron F-16 aircraft armament apprentice course student, poses for a photo at Sheppard Air Force Base, Texas, May 1, 2019. Lennox, an Arizona native, served in the Navy for 8 years prior to joining the Air Force. Lennox said he joined the Air Force to be a positive role model for his kids and to make a difference. (U.S. Air Force photo by Airman 1st Class Madeleine E. Remillard)