YF-17 Cobra Northrop YF-23 Lockheed YF-22 Lockheed YF-12 YF-73 YF-75 YF-77 2007 YF YF-100 2008 YF 2009 YF 2006 YF North American YF-93 Lockheed Martin F-22 Raptor General Dynamics F-16 Fighting Falcon
YF-17 Cobra Northrop YF-23 Lockheed YF-22 Lockheed YF-12 YF-73 YF-75 YF-77 2007 YF YF-100 2008 YF 2009 YF 2006 YF North American YF-93 Lockheed Martin F-22 Raptor General Dynamics F-16 Fighting Falcon