World War I: A look back 100 years later

Published: Jul 28 2014 11:46:33 AM EDT

Today marks the 100th anniversary of the beginning of World War I. Take a look back at one of the bloodiest conflicts in human history.

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Today marks the 100th anniversary of the beginning of World War I, when Austria-Hungary invaded Serbia following the assassination of Archduke Franz Ferdinand. The battle would last a bloody four years and cost more than 37 million civilian and military lives in one of the deadliest conflicts in human history.

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On this Day

  • Concorde lands after last commercial flight

    Aero Icarus/Wikimedia Commons

    On this day: October 24

    The first transcontinental telegraph message is sent, Harry Houdini gives his last performance, the United Nations is born, Jackie Robinson dies, and the Concorde makes its last commercial flight, all on this day.