1996: In Port Arthur, Tasmania, Australia, Martin Bryant, 28, goes on a shooting spree, killing 35 people and seriously injuring 23 more. He was arrested following an 18-hour standoff with police after setting the bed and breakfast where his rampage had begun on fire. He is currently serving 35 life sentences plus 1,035 years without parole in the psychiatric wing of Risdon Prison in Hobart, Tasmania. The incident was the worst mass killing in modern Australian history and helped launch an historic crackdown on gun ownership in the country. Seen here is a family at the Port Arthur memorial site during a commemoration service to mark the 10th anniversary of the massacre on April 28, 2006.