Lockheed YF-12

Lockheed YF-12

This jet was an American interceptor prototype with a top speed of mach 3.35. It looked almost like the SR-71 Blackbird and featured three Air-to-Air missiles. The reason for it looking a lot like the SR-71 was because the SR-71 was based on the YF-12. Only 3 YF-12’s were built but the program still made it into the history books with its  “highest speed”, “highest altitude” and “biggest interceptor” records.