Tarek Nasr runs a social media agency thriving in the middle of the biggest social media story of the past year.He is Managing Director and Founder of Planet360, one of the leading digital agencies in Cairo, Egypt.It was just over a year ago that demonstrators took to the streets of Cairo to demonstrate in public for the first time, demanding change, then demanding a revolution, and then forcing the ouster of strongman President Hosni Mubarak.