While the fastest, most agile aircraft in the world undoubtedly still fill military hangars, the fastest civilian helicopters have been gaining speed too.

We're diving into the top 10 fastest currently in operation or about to arrive ... The Cessna Citation X+ is also one of the fastest civilian aircraft and comes in second on our lineup. With a top ...

It was followed by the X-43, which flew at Mach 9.6 (10,240 km/h), making it the fastest aircraft ever flown. One of NASA’s X-43s is attempting to break new records, reaching speeds of several ...