>> if mubarak leaves you don't think the muslim brotherhood would take over? >> we're not going to allow them. >> tomorrow a massive protest has been called, the pressure keeps building. the protesters hope something soon has got to give. some of the people on the scenes we saw today in liberation square. as we said, it's just four hours until this massive protest is planned. i'm joined now by ben wedeman and nic robertson. what are you anticipating is going to happen today? >> the job of anticipating has become very risky here, because this whole protest movement has just sort of popped up in the last week, so it's very difficult to say. but we know that people are walking to cairo from the nile delta. we know that despite the fact the government has cut the internet, you can't send sms's, blackberries don't work. and within moments we expect the cell phone system to go down.