NELLIS AIR FORCE BASE, Nev. -- Airman 1st Class Thomas Feenstra marshalls a B-1B Lancer here. About 10,000 U.S. and coalition forces are participating in the Joint Red Flag exercise, which runs through April 2. Airman Feenstra is from the 34th Bomb Squadron at Ellsworth Air Force Base, S.D. (U.S. Air Force photo by Tech. Sgt. Patrick M. Kuminecz)