Reports today suggest that the horrific attack on the Boston Marathon was carried out using a pair of pressure-cooker bombs. While police scour video and photos for clues (the FBI is seeking any available content), we mapped reported use of this type of weapon during the past three years to serve as a resource for anyone investigating the bombings:
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Like so many organizations in the Boston community and elsewhere, we had employees, friends, and family in the area during the attack. Our thoughts are with all of those affected, and please let us know in the comments if there are other aspects of the media that we should further analyze.