killer. but that ban expired in 2004. a few u.s. states have kept some of its provisions in place. now, contrary to what some people in the world may think, richard, americans do have restrictions on firearms they can buy, including on fully automatic guns, short-barrelled shotguns, some rifles and silencers. but if you are of good conduct and sound mind in the united states, you can own a legal handgun after a short background check. despite how it may look to the rest of the world, this is a right that it under constant debate in the united states. richard? >> and it is that right, that second amendment right that perhaps, ali, distinguishes everything in the united states from the way it is viewed in the rest of the world. and that's why you and i are talking about it today. now, normally at this point, the voice would kick off our quiz challenge. of course, today we're not going to do anything like that. today because of the shootings in the u.s. which sparked so