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 .
NEW : The world must `` prevent Iran from getting nuclear weapons , '' Israeli PM says . At Davos summit , Iranian President presses reengagement with the world . But Iran will `` under no conditions '' give up peaceful nuclear program , he says . Rouhani calls for free elections in Syria , says opposition and government need to talk .