Egypt on edge ahead of rival rallies, Morsi backers dig in Tense Egypt braced Friday for a showdown in the streets between supporters of ousted president Mohamed Morsi and his army-backed opponents, who have called rival rallies across the Arab world's most populous country. Partisans of the deposed leader stood their ground outside the mosque of Rabaa al-Adawiya in Cairo's Nasr City. Images and soundbites