this guy was heavily armed and he had a problematic background. >> he really did. those are common things we see in people who perpetuate mass shootings. many have anger management problems in their past, domestic violence in their past. they are acting on some sort of grievance that's boiled to the surface. that's all very common. but another thing that's common with them is they're all armed with unbelievably lethal, high capacity magazine, very powerful weapons. it's hard to legislate against people's grievances and anger problems and it's hard to address with policy and legislation. but we could address with policy and legislation how people are bringing these sort of military-style weapons into the workplace. it's a persistent problem. >> certainly is. we did learn also that employees