David Kennedy, director of the Center for Crime Prevention and Control, recounts the development and execution of his plan to curb inner-city violence in Boston in the 1990s. Mr. Kennedy's proposal, dubbed the "Boston Miracle," brought together all the key actors in a neighborhood from the police and community members to gang members and drug dealers to openly discuss their issues in a way akin to an intervention. Boston's youth murders were cut by two thirds after installation of the program and it was replicated in over seventy cities, including Chicago, Washington, D.C., and Baltimore. David Kennedy responded to questions from members of the audience at Harvard Book Store in Cambridge, Massachusetts.