Three Cheers for the House of Commons

Today the House of Commons voted down the government's motion to support military action against Syria:

British Prime Minister David Cameron has lost a vote endorsing military action against Syria by 13 votes, a stunning defeat for a government which had seemed days away from joining the U.S. in possible attacks to punish Bashar Assad’s regime over an alleged chemical weapons attack.

Good to know that some people somewhere haven't lost their minds over this. Where is the American opposition?