Robin Wright: 'Cairo violence may escalate'
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.
20 Dec 2011