They are no longer needed,but back then you had to be of rank captain and above.
You had to take a computer tech course
Black
3.5
Stratosphere
2193 mph
2200 mph
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)
Nobody really knows because the black bird wasn't ment to travel.
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.