If history repeats itself, the fatal shootings of four Oakland police officers on Saturday afternoon will become the next benchmark in the national debate on a federal law to ban assault weapons. If there is a grain of hope to be gathered from a loss so tragic, it's that last weekend's horrific events will help end the debate on an unresolved policy issue that has resulted in thousands of deaths and helped sustain veritable demilitarized zones in some of our nation's... (GunPolicy.org)