Christened by former first lady Pat Nixon, the very first commercial 747 dubbed the "Jumbo Jet" entered service on January 22 of what year?

Answer 1970

Boeing's 747-100 made history on January 22, 1970, as the first wide-body airliner dubbed the "Jumbo Jet." This airplane is now one of the most easily recognizable and most widely used in film and historical depictions of flight.

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