Witness the construction of the Martin Luther King, Jr. National Memorial in Washington, D.C.
Time-lapse video of the building of the Martin Luther King, Jr. National Memorial in Washington, D.C., from 2009 to 2011.
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Encyclopædia Britannica, Inc.Abraham Lincoln once called the railroad the United States' most important goal.
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Encyclopædia Britannica, Inc.After the takeover of the U.S. embassy in Tehran in November 1979 by Iranian students aligned with Ruhollah Khomeini, more than 50 Americans were held hostage for 444 days.
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Contunico © ZDF Studios GmbH, Mainz; Thumbnail © Weerayos Surareangchai/Dreamstime.comOverview of the global financial crisis of 2007–08.
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Encyclopaedia Britannica, Inc.The riots outside New York's Stonewall Inn sparked a new era of LGBTQ activism.