chief correspondent martha raddats has more. >> reporter: good evening from cairo, this is the firste military's presidential crackdown on its own people. it has been the most violent week in the modern history of egypt. a military crackdown that has pushed this country to the edge of civil war, leaving one of america's great allies in this region awash in blood. last month, i witnessed peaceful protests here. when i returned yesterday, i found a country with scars that will take decades to heal. it began with the military ousting of mohammed morsi, egypt's first-ever democratically elected president and the leader of the muslim brotherhood party. morsi supporters refused to stop demonstrations, despite threats from the military. which moved in last wednesday to crush them. more than a thousand people have been killed. thousands more injured in the past week, the military intervention sparked outrage in the u.s. and across the world. fors first time, we got an explanation from the interim prime minister. the world has seen the pictures, 900, a thousand dead in the pro-morsi camps? >>