Mary Ellen O'Connell : But the use of chemical weapons is banned by international law . U.S. says U.N. approval wo n't affect plans for response to Syria . Comment: O'Connell : Obama right to denounce chemical weapons , should n't react outside U.N. law .
Mary Ellen O'Connell : U.S. says U.N. approval wo n't affect plans for response to Syria . Comment: O'Connell : Obama right to denounce chemical weapons , should n't react outside U.N. law .