Most of the laws aimed at gun control in the US don't work. But three do. Implement them at a national level, and we could cut firearm deaths by 90 per cent. That's the conclusion of a recent study, and it sounds like great news. But the findings have come under heavy fire from other researchers. There are more than 33,000 firearm deaths each year in the US. Yet no one knows which, if any, laws are effective in reducing this number. This is partly due to lack of... (GunPolicy.org)