How do we "get rid of the guns"?

Not even repealing the Second Amendment would do it, because the guns would still be there.

A national military operation to confiscate the guns would result in bloody chaos and martial law at the very least. It would also cost plenty.

The current lockdown strategy may be better than the extra doors, if the locked doors could be made more or less impregnable, like the doors on airliners after 9/11.

But let's face it: mass school shootings are extraordinarily rare. A kid is far more likely to be struck by lightning than shot by a school invader with an assault rifle.

There are better arguments for more gun control than pointing to Newtown or Aurora. I don't think the time has come to station armed guards with their own assault rifles and body armor at every school. And then the nuts will go to the churches. And the theaters. And the malls. The armed nut will always find people to shoot, and it usually won't matter if they're carrying a concealed handgun because the nut will generally have the drop on them.

The best imperfect solution is to keep guns out of the hands of lunatics. Background checks at gun shows would be a start.