Staff Sgt. Alex Graves and Maj. Zach Roycroft perform preflight checks for the first time on the Air Force’s newest helicopter, the MH-139A Grey Wolf, at Eglin Air Force Base, Fla. Graves, an Air Force Global Strike Command Det. 7 special mission aviator, and Roycroft, 413th Flight Test Squadron test pilot, were part of the aircraft’s first combined test flight Feb. 11. The Grey Wolf is set to replace the Air Force’s aging UH-1N “Huey” fleet. (U.S. Air Force photo/Samuel King Jr.)