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New Kids on the Block singer Joey McIntyre is among the eyewitnesses to a grisly explosion scene at the Boston Marathon.  McIntyre, a Boston native, was running in the race.  He tweeted that he had just crossed the finish line when he heard the blasts.  McIntyre wrote:

There are reports of multiple injuries at the scene in downtown Boston.  Witnesses describe hearing at least two blasts.  Rescue crews have flooded the street to treat in the injured.

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