Fox-body Ford Mustangs and a whole crop of high-performers from GM have served the US Air Force over the years, helping land the legendary U-2 spy plane ... chase cars to guide the pilot down ...

These cars were used for two decades, even driving under each wing to keep the U-2 plane steady ... the Air Force already is working with a new spy drone -- the RQ-4A. Its top speed is 357 ...

The U-2 spy plane is an engineering marvel, but it can't land on its own. This is the complicated process pilots have to go through to bring the plane down safely. Follow Tech Insider: On Facebook ...