Today, Moore has responded with a series of thought-provoking tweets.

Total # of gun murders in Japan each year? Somewhere between zero and 7. Guns don't kill people - Americans kill people.

— Michael Moore (@MMFlint) July 22, 2012

Of all the gun murders in the 23 richest countries combined, just ONE of those countries is responsible 4 80% of them. Who kills ppl? We do.

— Michael Moore (@MMFlint) July 22, 2012

So what is it about US? Yes, gun laws would help. But there'd still be thousands of us still wanting 2 kill someone. Why here¬ elsewhere?

— Michael Moore (@MMFlint) July 22, 2012