NASA has received two F-15 jets which had been retired by the US Air Force in order to advance its supersonic research ...
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NASA to modify two F-15 fighter jets to support development of silent supersonic X-59
The US Air Force has given NASA two retired F-15 jets to boost the ...
NASA Armstrong adds two retired F-15 jets to support supersonic research for the X-59, enabling high-altitude flights and ...
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