The SR-71 Blackbird is easily one of the world's most iconic aircraft. They first took to the skies in the 1960s, and by the turn of the century, they were retired. Nowadays, you can only find SR ...

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 ...

The SR-71 could fly at Mach 3.2 (around 2,100 miles per hour). So, Blackbird was not hypersonic as its anticipated successor, the SR-72, is set to be. Instead, it was a supersonic plane.

a similar closure impacted parts of the 71 and 91 Freeways for similar work, and again in December. The closures will turn through at least March 28. Periodically, east and westbound lanes of SR ...