Timeline: Boston Marathon bombings

Published: Apr 16 2013 12:30:08 PM EDT   Updated On: Jul 10 2013 04:08:11 PM EDT

With Boston Marathon bombing suspect Dzhokhar Tsarnaev pleading not guilty Wednesday in his first court appearance since being arrested, revisit a timeline of the events in the case so far.

Marathon Timeline - Race Begins
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9 a.m., April 15 -- Mobility-impaired runners kick off the 117th Boston Marathon.

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On this Day

  • Titanic wreckage

    Courtesy of NOAA/Institute for Exploration/University of Rhode Island

    On this day: September 1

    The last passenger pigeon dies, World War II begins, the Soviet Union shoots down a Korean airliner, and the wreck of the Titanic is discovered, all on this day.