Syria crisis: Did Obama's speech change views?
11 September 2013 Last updated at 06:53 BST
President Obama says he will pursue diplomatic efforts to remove Syria's chemical weapons but has ordered the US military to "be in a position to respond" if such measures fail.
In a televised address, he said he had asked Congress to postpone a vote authorising the use of force. The BBC's Rajini Vaidyanathan watched the address with people in Washington.