Two U.S. Air Force F-15E Strike Eagle pilots refuel while flying near Mosul, Iraq, Nov. 20, 2016. The F-15E Strike Eagle is a dual-role fighter designed to perform air-to-air and air-to-ground missions. An array of avionics and electronics systems gives the F-15E the capability to fight at low altitude, day or night, and in all weather. (U.S. Air Force photo by Staff Sgt. R. Alex Durbin)