Why America Is Prone to Mass Shootings

A strange paradox is emerging in America: Overall violent-crime rates are down, but active shooter events — in which a person is trying to kill multiple people in a populated area — appear to be on the rise, according to Federal Bureau of Investigation statistics. Meanwhile, a just-released study finds that although the United States has just about 5 percent of the world's population, the country has 31 percent of the world's mass shooters. The reasons for these numbers are complex,