No amount of government checks will prevent all crimes such as Virginia Tech. How many times does the government screw up? A person committed to a suicide mission can accomplish it with or without a firearm.
True but I'd like my suicidal and murderous rampagers to e using guns they have illegally. The kid was totally legal in being armed, any psych test would have stopped him from buying 1. Laws allowing his fellow, sane students to also carry would have also meant he wouldn't have gotten past his 1st victim, if that far.