By Gideon Rachman
The pace of events in the Middle East has quickened once again. More than two years since the start of the Arab spring, the facts on the ground can still change so rapidly in the region that western governments struggle to keep pace. Last week Barack Obama had convened an emergency meeting to discuss the violent crackdown against the Muslim Brotherhood in Egypt, only for the US president to find himself confronted with an even more dramatic challenge – a chemical weapon attack in Syria.
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