"Five death in US shooting rampage" / Gun wearing in US.

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"Prosecutors in the United States say a man shot four people to death in an apparent domestic dispute in Camden, New Jersey, before committing suicide" - quote Livenews.com.au Well I wanted to introduce my subject with this quote, because it is another drama caused by guns wearing in the USA. Since people can wear guns, they think they are in a possition of power compared to other people. Still, there is gun wearing permits, but I think it is not well restricted, as some mad people as this guy had one. There's also the problem of black markets, where you can find and buy a weapon quite "easily". What do you think about guns legislation in the USA ? Should it be more regulated ? What about black markets ? Should weapon wearing be forbidden in order to avoid dramas like this ?