U.S. Air Force Capt. Zoe “SiS” Kotnik, F-16 Viper Demonstration Team commander and pilot, performs a precision aerial demonstration over the flight line at Joint Base Langley-Eustice, Va., Jan. 28, 2019. Kotnik was originally assigned to the 55th Fighter Squadron at Shaw Air Force Base, S.C., before she earned an assignment to the demonstration team. (U.S. Air Force photo by Senior Airman Kathryn R.C. Reaves)