What is the ugliest plane in the world?
The Airbus A300-600ST Beluga is a modified A300 which is used (mostly) to carry Airbus components ready for final assembly across Europe to Toulouse or Hamburg. I often see these near Chester because Airbus wings are built in Broughton.
The Boeing Dreamlifter (here seen with downtown San Francisco in the background) is a modified 747-400 used for transporting aircraft parts to Boeing from suppliers around the world.
I think Airbus and Boeing should use each other's planes to ferry their parts around. This would be like Apple and Cray. When Seymour Cray was told that Apple Computer had just bought a Cray to help design the next Apple Macintosh, Cray commented that he had just bought a Macintosh to design the next Cray.