Mass shootings more common since 1960s - Yahoo! News

Mass shootings more common since 1960s - Yahoo! News: "And all through those years, the same questions have been asked: What is it about modern-day America that provokes such random violence? Is it the decline of traditional morals? The depiction of violence in entertainment? The ready availability of lethal firepower?

Northeastern University criminologist James Alan Fox blames guns, at least in part. He notes that seven of the eight deadliest mass public shootings have occurred in the past 25 years."