Citing international norms against the use of chemical weapons , U.S. President Barack Obama called for authorization from Congress to use military force in Syria . NEW : Sources : U.S. , Russia disagree over how to determine if Syria is meeting its obligations . Some countries will allow rebels to attack international targets , al - Hassan says . ` ` We can not know until the inspectors arrive in Syria , '' he tells Syria 's CCTV . The U.S.-Russian plan for Syria 's chemical disarmament calls for inspections soon .
NEW : Sources : U.S. , Russia disagree over how to determine if Syria is meeting its obligations . Some countries will allow rebels to attack international targets , al - Hassan says . ` ` We can not know until the inspectors arrive in Syria , '' he tells Syria 's CCTV . The U.S.-Russian plan for Syria 's chemical disarmament calls for inspections soon .