While the fastest, most agile aircraft in the world undoubtedly still fill military hangars, the fastest civilian helicopters ...

While they're not supersonic like some jet airplanes, many military helicopters fly through the skies at breakneck speeds.

Besides being one of the oddest looking helicopters ever flown ... 54 seconds, setting a world time-to-climb record that still stands. This story is a selection from the September issue of ...