High-powered guns' ammunition particularly destructive - Article Photos 1/2

Oklahoma City say this AR-15 rifle was used in the 2010 assault on police officer Katie Lawson, who survived despite her assailant firing 20 rounds without reloading. The military-style rifle, shown in a 2011 photo, is similar to one used in the massacre in Connecticut this month. Photo by Jim Beckel, The Oklahoman JIM BECKEL - The Oklahoman