In development it was the RS-17, but when LBJ announced it in a speech he got a bit dyslexic and turned things around to SR-71. It kept that name.
Black
3.5
2200 mph
Stratosphere
2193 mph
the stratosphere!
The SR-71 Blackbird was introduced into service in 1966.
It is the Lockheed SR-71 "Blackbird", a reconnaissance aircraft.
No it just flew very high to avoid radar.
About 3 times the speed of sound. (3 mach)
No it is an advanced, long range, Mach 3+ strategic reconnaissance aircraft.
The maximum speed of a SR71 is 2,200 mph at 80,000 ft.