If ever there were click bait for naysayers, it would be this week's announcement by Boeing that it's exploring a Mach 5 passenger jet capable of hopping the Atlantic Ocean in two hours and the Pacific in three. Boeing revealed the concept at the American Institute of Aeronautics and Astronautics.
This is a companion discussion topic for the original entry at https://www.avweb.com/recent-updates/business-military/forever-stuck-at-mach-0-70