This Saturday marks the one-year anniversary of the massacre at Newtown, Conn.'s Sandy Hook Elementary School. Twenty children, six staff members, shooter Adam Lanza and his mother all died that day. The killings reinvigorated both sides of the gun-control debate, but gun rights advocates maintained the edge they've had for years. [Interactive charts of US state gun laws and lobbying are displayed in the original] An impressive (roughly) 1,500 state gun bills have... (GunPolicy.org)