What loose gun laws are you specifically referencing? It's worth noting that Whitman and Oswald had easier access to firearms than we do today, yet they both selected bolt-action weapons as their firearms (Whitman also had an M1 Carbine). Additionally, the so-called "assault weapons" that are often demonized today were also available to Whitman and Oswald. So why are you focusing on the firearms themselves, rather than addressing the mental state of the "teenage wackos" you mentioned above?They used the weapons available to them. Now any teenage wacko can have real purpose built mass murder weapons and they don't even have to be a good shot. Gun nutters like to talk responsibility but they will never take responsibility for the loose gun laws they want and their politicians pass.