"Even though it’s illegal for the CDC to study gun violence and how to prevent it, there are still some data. One fact is that the AR-15 has emerged as a gun of choice for mass shootings—used in Parkland this week as well as Las Vegas, Sandy Hook, Orlando, and many other places now synonymous with tragedy. Meanwhile, in Kansas, a Republican congressional candidate is giving away an AR-15 as part of his campaign. Unlike pornography, the AR-15 was not a product designed for pleasure or fantasy, but for maximizing harm, a triumph of “wound ballistics.”"