![SR-71 Image source: NASA SR-71 Image source: NASA](http://www.timeone.ca/wp-content/uploads/2013/03/SR-71-e1403812115372.jpg)
Classification: machine
Chapter: Relatively Speaking
The SR-71, nicknamed the Blackbird, was a fast American reconnaisance plane built by Lockheed and Skunk Works that was operational from the ’60s to the ’80s. It still holds the speed record for manned air-fueled flight.