text: U.S. Calls Killings In Sudan Genocide (washingtonpost.com) washingtonpost.com - Secretary of State Colin L. Powell said for the first time yesterday that genocide has taken place in Sudan and that the government in Khartoum and government-sponsored Arab militias known as Janjaweed "bear responsibility" for rapes, killings and other abuses that have left 1.2 million black Africans homeless.