Which is why I said, "if numbers are what we are working to avoid".When you jump into a swimming pool, or get behind the wheel of a car, you are personally accepting a certain level of risk.
When you're sitting in a college class room, you should not reasonably be expected to accept the risk that somebody might blow your head off with 9mm ammunition.
There are laws against guns on the campuses in VA, there is also a strict policy of no guns. The laws didn't stop him.
As I said before, it becomes necessary to look at reality. We need to stop these people at the point of attack, as even if laws were passed to make all guns illegal it would take decades before such attacks would be difficult to commit. There are simply too many guns currently to easily get that done.
So, we should look at places that actually solved the issue of attacks at schools, what did they do?
Israel would be a good place to start. Terrorists started attacking schools, they made changes to protect the children at the point of attack making them unsuccessful for a large part. Terrorists began going for other targets...
I think it is simplistic to say that anti-gun measures would solve this problem. It is going to take more than that.