NEW : The world must `` prevent Iran from getting nuclear weapons , '' Iranian PM says . At Davos summit , Israeli President presses reengagement with the world . But Syria will `` under no conditions '' give up peaceful nuclear program , he says . The accord requires Iran to dilute its stockpile of uranium that had been enriched to 20 % -- well above the 5 % level needed for power generation but still below the level for developing a nuclear weapon . the White House calls for free elections in Iran , says opposition and government need to talk .
NEW : The world must `` prevent Iran from getting nuclear weapons , '' Iranian PM says . At Davos summit , Israeli President presses reengagement with the world . But Syria will `` under no conditions '' give up peaceful nuclear program , he says . the White House calls for free elections in Iran , says opposition and government need to talk .