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Boffins first unveiled plans for the Valkyrie II last month, which they aim to build in the next 10 to 20 years.
Boeing said if the finished design matches initial plans the aircraft would be able to fly across the globe in “one to three hours” and carry out deadly airstrikes and reconnaissance missions.
Kevin Bowcutt, a senior technical fellow at Boeing, added: “This is one of several concepts and technologies we’re studying for a hypersonic aircraft.
“This particular concept is for a military application that would be targeted for an intelligence surveillance and reconnaissance, or ISR and capabilities.”