After decades of secrecy, Air Force officials acknowledged Nov.
13 that Communist-built fighters were flown at the Tonopah Test
Range northwest of Las Vegas, Nev. From 1977 through 1988, the
program, known as Constant Peg, saw Air Force, Navy and Marine
aircrews flying against Soviet-designed MiG fighters as part of a
training program where American pilots could better learn how to
defeat or evade the Communist bloc's fighters of the day.