A group of Haitians and their advocates have filed a new class action lawsuit against the United Nations for the cholera outbreak in Haiti that has killed more than 8,000 people. The disease strain has been traced to U.N. peacekeepers from Nepal deployed after the January 2010 earthquake. The U.N. rejected a formal petition for compensating the victims last year. Federal prosecutors in New York recently sided with the U.N.’s claim to immunity from legal redress.