Supporters and opponents of Egypt's President Mohammed Morsi were on the streets of Cairo again on Tuesday, staging demonstrations in different parts of the capital. With the dueling camps separated, the chances of violence have decreased, but there was some early Tuesday in the city's iconic Tahrir Square. Morsi's opponents are demanding that he postpone a scheduled referendum on a draft constitution they see as flawed. But the president insists the vote will go ahead as scheduled on Saturday. Audie Cornish talks to Soraya Sarhaddi Nelson.