Syria: "there will be some kind of military reaction" (expert) President Donald Trump's threat of action against the Syrian regime places the United States and Russia at perhaps the greatest risk of conflict since the days of the Cold War. "If this kind of action goes on for days or weeks or even longer then I think we are in a very dangerous situation", says Perry Cammack, Fellow at the Carnegie Endowment For International Peace. IMAGES AND SOUNDBITES