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Robin Wright: 'Cairo violence may escalate'

20 December 2011 Last updated at 03:54 GMT

The confrontation in Egypt between protesters and security forces has stretched into a fourth day with the death toll reaching 13.

Gen Adel Emara, a member of the Supreme Council of the Armed Forces (Scaf), said there was a "systematic" plan to destroy the Egyptian state by shaking confidence in its security forces.

Robin Wright, a senior fellow at the US Institute of Peace, explains to the BBC why the military is no longer the facilitator of the transition, but is instead increasingly the obstacle.