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Timeline of the Boston Marathon bombings

A runner reacts near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. Alex Trautwig / Getty Images

In a matter of days, the world’s most famous marathon morphed from runner’s high to bloody terror, a sleuthing search for bomb-site clues, a pre-dawn firefight and a massive manhunt. Bostonians, runners and horrified onlookers the world over are trying to make sense of what’s going on.

Track major events following the Boston Marathon bombings and ensuing investigation with the interactive timeline below.

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