The mid-1960s saw the development and introduction of many new jetliners. None, however, has matched the dramatic impact of the 747. The incentive for creating the giant 747 came from reductions in air fares, an explosion in air-passenger traffic, the availability of larger thrust engines, and increasingly crowded skies. In addition, Boeing had already developed the design concepts and technology of such an airplane because the company had bid on, but lost, the contract for a gigantic military transport, the C-5A. The 747's final design was offered in three configurations: all passenger, all cargo and a convertible passenger/freighter model. The 747 was truly monumental in size. The massive airplane required construction of the 200-million-cubic-foot 747 assembly plant in Everett, Wash., the world's largest building (by volume). The fuselage of the original 747 was 225 feet long; the tail as tall as a six-story building. Pressurized, it carried a ton of air. The cargo hold had room for 3,400 pieces of baggage and could be unloaded in seven minutes. The total wing area was larger than a basketball court.