She was traveling the moment she ascended to the throne, and for much of the next seven decades, Queen Elizabeth II criss-crossed the world.Newly married and still just a princess, Britain’s future monarch was in Kenya with husband Prince Philip in February 1952 when she learned of her father’s death and her new regal status. During her reign she would visit more than 120 countries, witnessing first-hand the revolutions in global travel that shrank the world as her own influence over it diminished. The Queen lived through the advent of the Jet Age, flew supersonic on the Concorde, saw regimes change, countries form and dissolve, the end of the British…