In 1967 the U.S. became aware of the Soviet MiG-25 Foxbat. This made it necessary to develop a new aircraft to counter the MiG-25. The USAF rejected the USN F-14 Tomcat and issued its own requirements. The solution came in the form of the McDonnell-Douglas (now Boeing) F-15 Eagle. The F-15A made its inaugural flight in July 1972 and in January 1976 the first Eagle entered service. The "E" entered service in 1989. The F-15 was the first dedicated USAF air superiority fighter since the F-86 Sabre.