Fareed Zakaria: On April 28, 1996, in Port Arthur, Australia, a man named Martin Bryant went on a killing rampage. In the first 15 seconds of his spree, Bryant killed 12 people and injured another 10, all with an AR-15 assault rifle. In the end, 35 people lie dead, men, women and children. If his weapon of choice sounds familiar, it should. That's what Adam Lanza is believed to have used in the Newtown, Connecticut, massacre of 20 school children and six educators. In... (GunPolicy.org)