Semi-automatic rifles were on display for sale at The Nation's Gun Show held in the Dulles Expo Center in Chantilly, Virginia, USA, 28 July 2012. EPA/JIM LO SCALZO
Have strict gun laws in Australia made the country a safer place? After the 1996 Port Arthur massacre left 35 people dead, the government quickly passed strict laws limiting the ownership and use of guns. Seventeen years later, have those measures worked, and could similar legislation help solve the gun violence crisis in the United States?