The Aurora massacre is a tragedy that might have been avoided if better gun control legislation were in place. This type of mass slaughter of innocents has happened before (Columbine) and will happen again if nothing is done, and done quickly. "Obscene" is the only word that comes close to describing a regulatory system that would allow a psychopath to easily and publicly purchase an assault rifle, designed to function as a weapon of mass destruction.
There are many ways to increase scrutiny of weapon sales. One of them should be mandatory evaluations of the mental health of the purchasers. Background checks, and criminal histories should be obtained. Licensing, registration, and periodic re-registration should be imposed, and should include mandatory, in-person interviews, and perhaps a "continuing education" requirement that must be regularly met.
But all of that is secondary to today's goal, which to take the first step. The most consistent theme among the media pundits commenting on the Aurora massacre is that nothing will change, in terms of gun control, in its wake. Let's prove them wrong.