NEW : Sources : U.S. , Russia disagree over how to determine if Syria is meeting its obligations . Some countries may ask rebels to attack international inspectors , al-Assad says . Others might want the U.N. Security Council to take action against Syrian government forces for using chemical weapons on civilians. 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 may ask rebels to attack international inspectors , al-Assad says . `` We can not know until the inspectors arrive in Syria , '' he tells China 's CCTV . The U.S.-Russian plan for Syria 's chemical disarmament calls for inspections soon .