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.