An F-15EX Eagle II Fighter Jet assigned to the 40th Flight Test Squadron, taxis before taking off from Nellis Air Force Base, Nevada, Oct. 20, 2021. Aircraft from Nellis AFB, Eglin AFB Florida, and the Oregon Air National Guard are providing support for the Test and Evaluation of the F-15EX in operationally realistic scenarios to determine how effective and suitable the aircraft is at accomplishing its air-to-air mission for future Air Force use. (U.S. Air Force photo by William R. Lewis)