Summary: The X-44 Manta, a design concept from Lockheed Martin, offered innovative features like thrust vector control and a tailless delta-shaped design for enhanced stealth and maneuverability.

What You Need to Know: The Lockheed Martin X-44 Manta, short for "Multi-Axis No-Tail Aircraft," was a groundbreaking stealth fighter concept developed by NASA and the U.S. Air Force in 1999.