On this day five years ago, tens of thousands of Egyptians flooded into Cairo's Tahrir Square.
It was the start of an uprising that would unseat Egypt's longtime dictator, Hosni Mubarak, 18 days later.
Police initially allowed protesters leeway but then cracked down with tear gas and water cannons. Here's Soraya Sarhaddi Nelson's dispatch from the streets of Cairo on that first day:
Soraya spoke with a protester who, like many others, came out to demonstrate for the first time hoping for political and economic freedom.