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In page General Dynamics:

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GD's YF-16 first flew in January 1974 and proved to have slightly better performance than the YF-17 in head-to-head testing. It entered production as the F-16 in January 1975 with an initial order of 650 and a total order of 1,388. The F-16 also won contracts worldwide, beating the F-17 in foreign competition as well. GD built an aircraft production factory in Fort Worth, Texas. F-16 orders eventually totaled more than 4,600,[citation needed] making it the company's largest and most successful program.[citation needed]