Guns are banned in Mexico. No gun violance in Mexico is there?
No prisoner is armed in prison. No violance in prison is there?
The Second Amendment is a doomsday provision, one designed for those exceptionally rare circumstances where all other rights have failed -- where the government refuses to stand for reelection and silences those who protest; where courts have lost the courage to oppose, or can find no one to enforce their decrees. However improbable these contingencies may seem today, facing them unprepared is a mistake a free people get to make only once." -- Justice Alex Kozinski, US 9th Circuit Court, 2003