Red Flag cancelled again Published March 12, 2003 LANGLEY AIR FORCE BASE, Va. (AFPN) -- For the second time this year, Air Combat Command officials here cancelled a Red Flag exercise because of emerging Air Force deployment requirements.The exercise was originally scheduled to be held later this month at Nellis Air Force Base, Nev.Red Flag, a realistic combat-training exercise involving the armed forces of the United States and its allies, is conducted on the bombing and gunnery ranges at Nellis.The exercise lasts two, four or six weeks depending on its specific purpose and is held several times a year. (Courtesy of ACC News Service)