The near-infinite supply of cheap and efficient weapons has made them easier to come by than a glass of drinking water in some parts of the world. Is this just the way it is? In this talk, Samantha Nutt, doctor and founder of the international humanitarian organization War Child, explores the global arms trade -- and suggests a bold, common sense solution for ending the cycle of violence. "War is ours," she says. "We buy it, sell it, spread it and wage it. We are therefore not powerless to solve it."