Jolie Opens Sexual Violence Summit, Weaver to Return for "Avatar"
Description:Angelina Jolie joined British Foreign Secretary William Hague in London for a summit focused on ending sexual violence in conflict zones. Jolie is a special envoy for the United Nations High Commissioner for Refugees (UNHCR) and has been actively involved in combatting rape as a weapon of war. The four day event will involve 1200 officials and activists from 150 nations.(1:19)