It's sad as hell that those kids were gunned down, but restricting legal gun ownership for law-abiding citizens only serves to give the upper hand to the bad guys.
Translation: I don't give a shit how many kids were murdered; just don't take away my Right to arm myself to the teeth with enough ammo to blow everyone to kingdom come.
The mentality of the morons who insist that their Right to Bear Arms out-weighs every other consideration on the planet, is just unbelievable and because of this, the United States will continue to see mass murders like this. Really, there's little point in even continuing to debate given the warped mind-set of some.