Syria bind opens door to extremists

The latest attacks in central Damascus illustrate clearly the ability of rebel forces to strike at the heart of President Assad's regime. But political and military stalemate mean the crisis is likely to drag on, providing an opportunity for the rebellion's more extreme elements to proliferate. Seb Morton-Clark hears the latest from the FT's Michael Peel in Damascus, with analysis in London from Roula Khalaf, Middle East editor.