X-44 Manta: What the New NGAD Fighter Could Eventually Look Like?
The Air Force’s—and NASA’s—motivation behind the X-44 Manta project, starting in 1999, was to test the feasibility of full yaw, pitch and roll authority without tailplanes (horizontal or vertical), with attitude control relying purely on 3D thrust vectoring.
Beyond Top Gun: Unveiling Lockheed's Revolutionary NGAD Fighter
USAF/US NAVY 6G Fighter Programs - F/A-XX, F-X, NGAD, PCA, ASFS
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The National Interest: Blog
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X-44 Manta Could This Be The Future Of The US Air Force?
Finally: America is Ready to Release New Video X-44 Manta to
Lockheed Martin F-22 Raptor - Wikipedia
The X-44 MANTA Was a Futuristic Version of Lockheed's F-22 Fighter