During the early 1960's the US Air Force, asked for tenders to build and supply a large transporter. It was believed that Boeing had the edge over its competitors, Lockheed and Douglas. However, in 1965 the Air Force announced Lockheed had won the bid with their C5-Galaxy. Boeings misfortune, at losing the contract, became the factor that assisted the creation of the 747 Jumbo. The technology Boeing used to build the Jumbo plane was accumulated over many years - mainly from building bombers for the US Air Force during the war years, one example is the B- 29. This week we complete our tour of Boeings history.