That's what the rest of the world asks, every time this happens. We can all see you are being held hostage by a few gun nuts, why can't you?
It's YOUR constitution, change it (if necessary) and save yourselves. Right now, another shooter is planning to kill American children. Eventually you will realise they are YOUR children.
The NRA could increase it's funding by 1000% if it put up billboards saying how many innocent Americans have died from guns - as long as they were in Arabic and on the other side of the world.
But hey, I don't live there and my two daughters don't have to learn how to run in zig-zag lines to avoid fatal shots, what do I care? I do care and I know someday the gun nuts will fall.