Guns deter crime by creating the possibility that criminals will be shot during the comission of the crime. Guns are necessary to check a tyrannical government by providing the people with the ability to rise in revolution. Making guns illegal only keeps them out of the hands of law abiding citizens thus leaving the criminals as the only ones who are armed and giving law abiding citizens nothing with which to defend themselves. Areas where guns are banned tend to have higher rates of gun violence. Examples: schools, churches, and shopping malls... and D.C.