Eventually, the people on the street, armed with nothing more than a cell phone and a free social media site, changed the course of history. If you are a middle or high school social studies teacher, and you wanted to provide your students with a close-up view of the events unfolding in Egypt, you could turn to a traditional news service. Or, you could follow the hashtag #Egypt on Twitter and tap into the real-time pulse of unfolding events by people on the streets of Cairo.