This study examines differences in U.S. attitudes about terrorism and government countermeasures before and after the Boston Marathon bombings by comparing the responses of American adults who completed a survey immediately before the bombings with the responses of a similar group of Americans who completed the survey immediately after the bombings.
LaFree, Gary, and Stanley Presser, Roger Tourangeau, Amy Adamcyzk. 2013. "U.S. Attitudes toward Terrorism and Counterterrorism Before and After the April 2013 Boston Marathon Bombings." October. www.start.umd.edu/start/publications/local_attachments/START_USAttitudesTowardTerrorismandCT_BeforeAfterBoston_Nov2013.pdf