EIELSON AIR FORCE BASE, Alaska -- Four F-16s from the 18th Fighter Squadron here fly behind a KC-135 Stratotanker after refueling during Red Flag Alaska July 20. More than 80 aircraft and 1,500 servicemembers from six countries are flying together over the Last Frontier July 12-27 to sharpen their combat skills in simulated combat sorties. (U.S. Air Force photo by Capt. Tana R.H. Stevenson)