but acetone tone reports, curbing gun violence may require addressing more than just gun sales. >> the video game industry is facing white it considers its most serious threat in 20 years the possibility of new government regulations on violent games. vice president biden told game makers he has reached no conclusions about video game violence but suggested he may be the only one. >> you all know the judgments other people have made. >> last month's shooting in newtown connecticut produced a barrage of judgments that video games contribute to a culture of violence, even from the head of of the nra, wayne lapierre. >> and they play murder, portray murder as a way of life. and then they all have the nerve to call it "entertainment." >> reporter: the video game industry rebuffed a government crack down 20 years ago by creating ratings, similar to those for movies. violent games are rated m which the industry considers suitable