Nearly half of Americans (47%) think gun violence will increase in the U.S. over the next ten years, according to a new CBS News poll released Sunday. Just 14% think gun violence will decrease. Americans differ on what causes gun violence. The availability of guns and current gun laws is the top answer -- particularly among Democrats -- though lack of gun training, crime, mental health issues, moral values, and other causes are also volunteered by many... (GunPolicy.org)