Pan Am was the first to conquer the transatlantic commercial passenger route in the run-up to World War Two with its legendary Boeing B-314 Clippers. There is so much to know about these giant Boeing B-314 Clippers – the massive long-haul flying boats of its time. 12 of these clippers were built – nine of which were operated by Pan Am. It was the trailblazing B-314 named Yankee Clipper that would lead the charge to offer the first non-stop transatlantic passenger service.