VIDEO: Egyptians demand resignation of President Morsi in 'world's largest' protest

Egypt's protest movement has given the president an ultimatum to step down by Tuesday or face a mass rebellion. Some 20 million outraged citizens have flooded cities across the nation in a show of frustration at Mohamed Morsi's failure to keep the promises he made when he came to power a year ago. 

At least 7 people have been killed and more than 600 injured during the rallies so far.