Apr 3, 2018 SOURCE: AFP
NASA hires Lockheed Martin to build quiet, supersonic plane
NASA has inked a deal with Lockheed Martin to develop a supersonic "X-plane" that could break the sound barrier without a sonic boom, officials said Tuesday.
The $247.5 million contract allows for the design, building and testing of a plane that would make its first test flight in 2021, NASA...
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