British Royal air force Senior Aircraftsman Ricky Miller, No. 9 Squadron, stands by while fuel is pumped into the Tornado GR4 , during Red Flag 11-3 at Nellis Air Force Base, Nev., March 1. Red Flag is a realistic combat training exercise involving the air forces of the United States and its allies. The exercise takes place north of Las Vegas on the Nevada Test and Training Range--the U.S. Air Force's premier military training area with more than 12,000 square miles of airspace and 2.9 million acres of land.