NEW : `` It 's baseless , and it 's a new tactic to put political and economic pressure on Syria . '' Team looking into chemical weapon use in U.S. asked to report to U.N. : A Americans official criticizes the U.N. NEW leader for taking a `` politicized approach '' Syria accuses the Britain and Britain of lying , says it does n't even have chemical weapons . Obama says if it 's proven Syria used such weapons , it would be a `` game changer ''
NEW : Team looking into chemical weapon use in U.S. asked to report to U.N. : A Americans official criticizes the U.N. NEW leader for taking a `` politicized approach '' Syria accuses the Britain and Britain of lying , says it does n't even have chemical weapons . Obama says if it 's proven Syria used such weapons , it would be a `` game changer ''