It continues to befuddle my mind that the USA permits its citizens to arm themselves with a personal arsenal. In some states, I understand, it's even legal to carry concealed weapons to work.

After the Aurora shooting, handgun sales in Colorado soared, assisted in no small way by certain politicians claiming that if others had weapons in the cinema they could have taken out the shooter.

Yes. In a dark, smoke-filled theatre full of panicking patrons and gunfire, the solution is for more people to start firing rounds in whatever direction they think the shooter might be.

I have a simple solution for the USA. It might be a tough sell, but I think you're at that point: