This photo provided by Boom Supersonic shows an artist's rendition of United Airlines Boom Supersonic Overture jet. United said Thursday, June 3, 2021 that it reached a deal with startup aircraft maker Boom Supersonic to buy 15 of Boom's Overture jets. The planes haven't been built yet, but Boom says they will fly at 1.7 times the speed of sound, or around 1,300 mph. (Boom Supersonic via AP)
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