At a stroke, President Mohammed Morsi struck the biggest blow against the army's political power since the "Free Officers" established the military's dominance by toppling the monarchy in 1952. The biggest casualty of the purge was Field Marshal Mohammed Hussein Tantawi, head of the Supreme Council of the Armed Forces, who served as Mr Mubarak's defence minister for 20 years. But the president has done his best to preserve Field Marshal Tantawi's dignity, awarding him a medal and a special payment on top of his pension. Addressing the nation, Mr Morsi said his move had not been aimed at individuals....