bad things it's not supposed to say for 30 years, we need a change of course, but it would be unrespectful if i didn't respect what he did. >> reporter: around 4:00 a.m. heavy gun fire erupted and the clash has taken on a sinister turn. and as dawn breaks there are calls for egyptians to come to the square to help the demonstrators. >> reporter: people are pouring into the square. they are moving around burning vehicles and that is what we can smell from here arid smoke right now. and we will wait to see how this day develops. bill? >> christiane amanpour in cairo. stay safe and thanks for that report. >>> when we come back, we shift our focus stateside. 1,000 cars stranded on chicago's lake shore drive. how one gigantic storm shut down a city that is no stranger to winter. [ male announcer ] learn about a free trial offer from abilify. if you're taking an antidepressant and still feel depressed one option your doctor may consider is adding abilify. abilify treats depression in adults when added to an antidepressant. some people had symptom improvement in as early as one to two weeks after