It's only been about a decade since psychological research has begun looking at what's increasingly being called "rampage violence," of the type that led to this morning's elementary school shooting in Connecticut as well as this year's shooting in Aurora, CO, and so many more. They are all separate events, but the psychological community has begun to attempt to analyze them as a whole to see if we can better understand why these "rampages" happen--and if there's a way to prevent them.