If the X-44 would have been stealthier than the F-22, it stands to reason that it was the impetus behind the NGAD program.
6th Generation Fighter, Page 3
The National Interest: Blog
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USAF/US NAVY 6G Fighter Programs - F/A-XX, F-X, NGAD, PCA, ASFS news, Page 105
Why can't we make more F-22s? - Quora
USAF/US NAVY 6G Fighter Programs - F/A-XX, F-X, NGAD, PCA, ASFS news, Page 105
