SR-72: How the Mad Scientists at Skunk Works are Building a Mach 6 Plane
Steve Weintz
The National InterestSeptember 29, 2017
SR-72: How the Mad Scientists at Skunk Works are Building a Mach 6 Plane
Like a bolt out of the blue, Lockheed Martin’s renown Skunk Works publicly teased one of aviation’s great snark hunts—revealing plans for a successor to the SR-71, the legendary Mach-3 reconnaissance plane designed with slide rules and retired when the millennials were born.
https://www.yahoo.com/news/sr-72-mad-scientists-skunk-120100358.html
