New York City, Police Officer
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The gunman who killed four people at an office building in New York City on Monday evening left his home in Las Vegas, Nevada late last week.
As New York City celebrates the 400th anniversary of its founding, National Geographic looks back on more than a century of covering the spirited metropolis.
Joe Macken spent 21 years constructing a model of the city, including bridges, brownstones and both the twin towers and One World Trade Center.