EIELSON AIR FORCE BASE, Alaska -- An F-15C Aggressor from 65th Aggressor Squadron, Nellis Air Force Base, Nev., flies over a mountain range on a refueling mission at Red Flag - Alaska July 25. Red Flag - Alaska enables aviation units to sharpen their combat skills by flying simulated combat sorties in a realistic threat environment. More than 80 aircraft and 1,500 service members from six different countries are participating in the exercise over the Last Frontier July 12 through 27. (U.S. Air Force photo by Capt Tana Stevenson)