What made the SR-71 Blackbird the ultimate spy plane? Was it its stealth, speed, or high-altitude capabilities? And why did it disappear from military service?

During a fly-over request in England, the SR-71 Blackbird spy plane was able to hit speeds as low as 160 knots (equivalent to ...

Designed to push the envelope of speed and altitude, the SR-71 wouldn’t have been able to operate using existing technologies; accordingly, new technologies had to be invented.

The legendary SR-71 Blackbird retains the record for America’s fastest manned aircraft—ever. While almost everyone has heard of the American-made F-22 Raptor and F-35 Lightning II platforms ...