intelligence analysts now have, quote, multiple indicators that chemical weapons were not used. officials emphasize this preliminary conclusion is in part based on video from syria. intelligence analysts say they see no indication patients are being treated for symptoms of chemical weapons outlawed by the international community. and classified satellite data also shows no chemical tip scud missile was launched that certainly would have caused mass fatalities. officials say it's more likely people were exposed to a chemical such as chlorine. >> if they are agents that are used by other societies for civil and accepted purposes, that's probably a bit different than what the president is drawing as a red line. >> reporter: but no signs of nerve or blister agents. that, officials say, is president obama's red line. syrian regime forces had claimed rebels launched the latest