The Airborne Advantage Tactical Company (ATAC a Textron company) provides tactical (aggressor) training with a fleet of over 90 aircraft. The private company provides support to the US Department of Defense in locations world-wide, including the Continental United States, Hawaii and the Western Pacific. They operate with Mirage F1s, L-39s, Hawker Hunters and these beautiful Kfirs. On the exhaust part, clearly Kfir C2 / F-21 is stencilled, the latter referring to the once F-21 fleet of the US Navy. Here N401AX is turning to the runway of Point Mugu, it was closely followed by N402AX that day.