Hello; The Boeing 747 actually started out as a prototype heavy cargo plane designed for the U.S.A.F. in which Boeing was confident they would get the contract, but didn't. During a very famous fishing trip between the two respective C.E.O's., an agreement was reached in which Boeing had a Beautiful Plane with no purpose, and Pan-Am had a Perfect Purpose with no plane! The only condition of which being the three HVAC units normally situated behind the cockpit would be moved to the lower decks, opening up an entirely new deck for Pan-Am to use for first class service. Long story short, with one single aircraft, Pan-Am completely redefined what 'First Class' meant on an major airline. Since the invention of aircraft, travel around the world has been transformed. No longer do we rely on long boat trips, but even the furthest parts of our planet are reachable in less than 24 hours. There are, however, countless different aircraft designs, each for specific purposes… whether it be the transport of passengers, for military purposes, or something else entirely. Fasten your seatbelts, put your tray into its locked position, and pay attention to your safety briefing as we look at the 15 most incredible airplanes in the world!