Transcript for Egypt: Massive Protest
And in egypt this evening, perhaps the most arresting images since the arab spring there. Giant protests unfolding with several million people on the streets of cairo now, marking the one-year anniversary of their president's inauguration. But now, they're demanding he resign. The resistance building and turning violent. As rereported last night here, an american college student among those killed. He was a bystander and he was there in egypt to teach english to children. Abc's alex marquardt is in tahrir square. Reporter: Wave after wave they came, marching straight towards the palace of mohamed morsi. This protest is unbelievable. This stretches back as far as the eye can see. These are scenes reminiscent of the revolution 2 1/2 years ago. And now these very same protesters are trying to spark a second revolution. He's not even trying. He is doing everything for his muslim brotherhood group. Reporter: Nearby, the muslim brotherhood held a far smaller rally for morsi, supporters arguing he hasn't had muff time to succeed. These supporters of president peaceful, but it is clear they were ready to fight for their president. Now the country is afraid tha it could fall into civil war. Violence in the past three days has already claimed seven victims, including american student andrew pochter. On friday, the 21-year-old was a bystander at a protest when he was stabbed. His family said he loved the middle east and wanted to move here in pursuit of peace. Tonight, that peace is illusive and egypt is more divided than ever. Alex marquardt, abc news, cairo.
This transcript has been automatically generated and may not be 100% accurate.