With downtown Las Vegas in the background, Airman 1st Class Kevin O'Brien keeps an eye on operations on the flightline at Nellis Air Force Base, Nev., Aug. 25 while waiting for aircraft from his unit to take off for a Red Flag training mission. Red Flag offers pilots and ground crews training in actual wartime scenarios to increase their combat skills. Airman O'brien is with the Massachusetts Air National Guard's 104th Fighter Wing at Barnes Air National Guard Base in Westfield, Mass. (U.S. Air Force photo/Senior Master Sgt. Robert J. Sabonis)