New York To Paris In 90 Minutes. Can This Startup Make It Happen?

https://www.forbes.com/sites/jeremybogaisky/2023/08/22/new-york-to-paris-in-90-minutes-can-this-startup-make-it-happen/?sh=5fe075f72ec6

"hypersonic drones (Quarterhorse and Darkhorse) and 20 passenger Mach 5 plane (Halcyon) 4,000 mile range costing >$10,000... 2024 first flight... air-breathing aircraft, which use the oxygen around them for fuel combustion instead of carrying it onboard as rockets do, leaving less room for payload like passengers"

Related: U.S. Naval research laboratory developing incredible morphing hypersonic engine
https://thedebrief.org/u-s-naval-research-laboratory-developing-incredible-morphing-hypersonic-engine/