What absence of control, exactly? We don't even know yet how he bought most of these guns. But by all accounts, he was a law abiding person without any criminal history or history of mental illness. He acquired these guns over a long period, years in fact. What kind of control or law would have stopped a gun dealer from selling to him? We know he modified some of the weapons to be fully automatic. That is already illegal. Very illegal. The possession of modern automatic weapons has been illegal in the US since the 1960's. Find me the law that would have prevented this. People who are bent on murdering 59 people and wounding 500+ and then killing themselves do not care about breaking the law. The only people who follow these laws are folks like me.