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the first us air force fighter was the P-59 Airacomet http://www.aviation-history.com/bell/xp59.html
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the Lockheed P-80 shooting Star was another first generation fighter plane. https://en.wikipedia.org/wiki/Lockheed_P-80_Shooting_Star
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another second generation fighter was the Convair F-102 Delta Dagger https://en.wikipedia.org/wiki/Convair_F-102_Delta_Dagger
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the second generation fighter was the Vought F-8 Crusader. https://en.wikipedia.org/wiki/Vought_F-8_Crusader
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The F-4 Phantom 2 was the third generation US fighter plane https://en.wikipedia.org/wiki/McDonnell_Douglas_F-4_Phantom_II
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the Grumman F-14 Tomcat was the fourth generation fighter plane https://en.wikipedia.org/wiki/Grumman_F-14_Tomcat
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the Lockheed Martin F-22 raptor was the fifth genaration fighter plane https://en.wikipedia.org/wiki/Lockheed_Martin_F-22_Raptor
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the sixth generation fighter plane hasn't been released yet https://www.washingtonpost.com/news/checkpoint/wp/2016/02/06/this-futuristic-fighter-jet-will-likely-be-unveiled-to-america-during-the-super-bowl/
