Britain's House of Commons becomes Brexit battleground as marathon make-or-break debate gets underway

Pro-Brexit supporters are seen outside the House of Commons in London, Britain, on Dec. 4, 2018. British Prime Minister Theresa May said the five day Brexit debate which started Tuesday evening in the House of Commons will set the course Britain takes for decades to come. Next Tuesday MPs will vote on whether to support or reject a deal agreed between May's government and the European Union on Britain's future relationship with Brussels. (Xinhua/Stephen Chung)