Why a Mach 5 passenger plane is a crazy idea that might just work

Almost two decades since Concorde retired, interest around supersonic travel has been picking up pace, and several super-fast planes are under development. Airlines seem interested: United has already committed itself to offering supersonic routes as early as 2029.

from CNN.com - RSS Channel - World https://ift.tt/2YU7SuY
via IFTTT