The Lockheed Martin SR-71 “Blackbird” still holds the world record as the fastest manned jet aircraft ever constructed, with an official top speed of Mach 3.3 (times the speed of sound).

The SR-71 Blackbird is easily one of the world's most ... The SR-71 was fast — so fast it set records that have yet to be broken. Speed like that makes it difficult to see and fire upon, and ...

In 2013, Lockheed Martin announced development of the successor to the SR-71 Blackbird spy plane. The SR-71 was capable of reaching speeds over three times the speed of sound, and the SR-72 is ...