Staff Sgt. Alex Graves performs preflight checks for the first time on the Air Force’s newest helicopter, the MH-139A Grey Wolf, Feb. 11 at Eglin Air Force Base, Fla. Graves, an Air Force Global Strike Command Det. 7 special mission aviator, was 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.)