Updated: April 18, 2013 at 10:11 AM
Boston Marathon bombing (59 images)
Two explosions near the finish line of the Boston Marathon killed three people and injured more than 150 on April 15, 2013. Security tightened in cities across the country as the investigation began.
A Boston Marathon runner shows off her medal in front of a makeshift memorial for Monday's Boston Marathon bombing victims near the site on Boylston Street in Boston, Massachusetts April 17, 2013. On Monday two bombs detonated near the finish line of the Boston Marathon killing 3 and injuring over 140. UPI/Matthew Healey
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People stand around a signed banner at a candlelight vigil held at Boston Common in Boston, Massachusetts on April 16, 2013. The vigil is in response to the bombings on Boylston Street near the finish line of the Boston Marathon Monday afternoon killing 3 and injuring 150. UPI/Matthew Healey
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A woman consoles a 2013 Boston marathon runner at a candlelight vigil held at Boston Common in Boston, Massachusetts on April 16, 2013. The vigil is in response to the bombings on Boylston Street near the finish line of the Boston Marathon Monday afternoon killing 3 and injuring 150. UPI/Matthew Healey
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A group of people console one another at a candle at a candlelight vigil held at Boston Common in Boston, Massachusetts on April 16, 2013. The vigil is in response to the bombings on Boylston Street near the finish line of the Boston Marathon Monday afternoon killing 3 and injuring 150. UPI/Matthew Healey
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