US President Barack Obama has said the US will continue to threaten Syria with the use of force as the government of Syrian President Bashar al - Assad has agreed to put its chemical weapons under the control of the United Nations.“We need to see concrete actions to demonstrate that Assad is serious about giving up his chemical weapons … And since this plan emerged only with a credible threat of US military action, we will maintain our military posture in the region, ” Obama said in his weekly address to Americans on Saturday. The threat came after the Syrian ambassador to the UN said on Thursday that his country became a full member of the international treaty prohibiting chemical weapons. After Russia offered a diplomatic proposal for putting Syria’s chemical weapons under international control on Monday, Obama called on Congress to delay a vote on his call for a military action against Syria. Nevertheless, in his weekly address to Americans, Obama said, “If diplomacy fails, the United States and the international community must remain prepared to act. ” Obama’s talk of “the international community” comes as senior officials within his administration have said he would not push for a United Nations Security Council resolution threatening Syria with the use of force. This comes as Russian President Vladimir Putin said in an op - ed published byThe New York Times on Wednesday that a possible US attack on Syria “is unacceptable under the United Nations Charter and would constitute an act of aggression.” Meanwhile, recent polls have revealed a growing opposition to military action against Syria both within the US military and America’s war-weary public.