Two F-15E Strike Eagles maneuver to bomb a ground target during a training flight April 20 over Alaska. The F-15Es are assigned to the 90th Fighter Squadron at Elmendorf Air Force Base, Alaska. (U.S. Air Force photo/Tech. Sgt. Keith Brown)

Two F-15E Strike Eagles getting ready to refuel over Alaska. The F-15Es are assigned to the 90th Fighter Squadron at Elmendorf Air Force Base, Alaska. (U.S. Air Force photo/Tech. Sgt. Keith Brown)

An F-15E Strike Eagle fly's along the Wrangell and St. Elias Mountain Range during a training mission April 20 over Alaska. The F-15E is assigned to the 90th Fighter Squadron at Elmendorf Air Force Base, Alaska (U.S. Air Force photo/Tech. Sgt. Keith Brown)

12th Fighter Squadron F-15 gets checked by the maintainers on an Icy ramp at Elmendorf AFB.

A 12th Fighter Squadron F-15 Eagle from Elmendorf Air Force Base, Alaska, refuels behind a KC-135 Stratotanker March 26 over the Pacific Alaska Range Complex. The KC-135 is from the 168th Air Refueling Squadron at Eielson AFB, Alaska. Nearly all internal fuel, up to 200,000 pounds, can be pumped through the flying boom, the KC-135's primary fuel transfer method. (U.S. Air Force photo/Master Sgt. Robert Wieland)