 Pan Am was the launch customer of the Boeing 747, placing a $525 million order for 25 in April 1966.On January 15, 1970 First Lady Pat Nixon christened a Pan Am Boeing 747 "Clipper Young America" at Washington Dulles in the presence of Pan Am president Najeeb Halaby.During the next few days, Pan Am flew several 747s to major airports in the United States as a public relations effort, allowing the public to tour the airplanes.