U.S. Accuses Cuba of Germ Weapons Program***WASHINGTON (Reuters) - The United States, yet to find evidence to back its charge that Iraq had weapons of mass destruction, issued a new accusation on Thursday that Cuba had a "limited" biological arms program. Cuba has previously denied the accusation, repeated on Thursday by Assistant Secretary of State for the Western Hemisphere Roger Noriega at a Senate Foreign Relations Committee hearing on Cuba. Noriega was responding to a question from Sen. Christopher Dodd, a Democrat from Connecticut, who asked why Washington continued to enforce a four-decade sanctions regime against Havana. ***