Special access to an elite powerboat-racing championship - the Offshore World Championships in Key West, Florida - reveals the cutting-edge technology behind the world's fastest boats, super-fast vessels that are expertly engineered to almost fly.

The world's first flying car, the Seraph (made by Vertical Aerospace in Bristol, England), might be on the market sooner than we think. As a new, cutting-edge invention goes through a series of grueling tests, behind-the-scenes access reveals the secrets of this sci-fi innovation.