Egypt is on the brink of something. Of what exactly, we're not quite sure yet. As thousands of anti-government protesters take to the streets demanding president Morsi to step down, the army has issued an ultimatum to the Islamist leader pushing him to agree to share power with the opposition. Clashes with police, raging fires, looting and a tallied 16 deaths have added to the country's political chaos. Meanwhile, a record number of sexual assaults have been reported in Cairo's landmark square. Watch Tahrir as the clock ticks and the ultimatum nears its deadlines.