We’ve had a massive decline in gun violence in the United States. Here’s whyhttps://www.washingtonpost.com/news/wonk/wp/2015/12/03/weve-had-a-massive-decline-in-gun-violence-in-the-united-states-heres-why/ by cordite • 11 years ago 1 0 11 years agoWAwashingtonpost.com