In light of the series of bombs that exploded near the finish line at the Boston Marathon on April 15, the University of Maryland's National Consortium for the Study of Terrorism and Responses to Terrorism (START) has compiled data on the history of terrorism in Boston, Massachusetts, terrorist usage of coordinated attacks in the United States, and terrorist attacks at previous marathons around the world.
Miller, Erin, and Kathleen Smarick. 2013. "Boston Marathon Bombings." April. www.start.umd.edu/sites/default/files/files/publications/br/STARTBackgroundReport_BostonMarathon2013.pdf