Found and Explained Official on MSN

The Soviets nearly built a Mach 3 spy plane before the SR-71 ever flew

Soviet engineer Pavel Tsybin proposed a high-altitude reconnaissance aircraft capable of roughly Mach 2.5 to Mach 3, ...
Not What You Think Official on MSN

How the CIA hid a Mach 3 spy plane on American highways

Before one of America’s most secret spy planes could fly from Area 51, it first had to get there without anyone realizing ...
The Aviationist on MSN

First to Mach 2: A Look at the Douglas D-558 Skyrocket

Using both turbojet and rocket propulsion, the Douglas D-558 Skystreak and Skyrocket research aircraft set a series of speed ...