Tech. Sgt. Travis Kidwell, 40th Helicopter Squadron UH-1N Iriquois flight engineer, calls approach to the pilots as they descend into the landing zone July 6, 2016, near Malmstrom Air Force Base, Mont. Flight engineers guide the pilots using a countdown while looking outside to ensure the main and tail rotors are clear of any obstacles. (U.S. Air Force photo/Staff Sgt. Delia Marchick)