SR-71 “Blackbird”: Sure, not everyone needs to hit Mach 3 when flying, but the Lockheed SR-71 could. Developed as a long range, Mach 3+ strategic reconnaissance aircraft, the SR-71 served the USAF from 1964 to 1998. When targeted, the SR-71 simply accelerated to outrun the threat, not a bad a capability to have on board.
