F-35A Lightning II aircraft from the active duty 388th and Reserve 419th Fighter Wings taxi at Hill Air Force Base, Utah, during a recent combat exercise. Airmen from the 421st Fighter Squadron are leaving this week to participate in Red Flag 20-1 at Nellis Air Force Base, Nevada. The exercise is the Air Force's premier combat exercise and pits two large forces against each other to simulate realistic combat scenarios. U.S. Air Force photo by Todd Cromar)