The F-16 Fighting Falcon was produced by General Dynamics who became Lockheed who then merged with Martin Marietta to become Lockheed Martin. The F-16 entered service in January 1979 as a multi-role jet fighter that evolved into an all-weather multi-role aircraft capable of sustaining 9-g turns. The F-16 is relatively inexpensive to purchase and maintain so the U.S. and 25 other countries added it to their inventory. The Fighting Falcon is referred to by its pilots as the “Viper” and will remain in USAF service until 2025.