Ten years ago the Arab spring spread into north Africa’s biggest country as more than a million Egyptians, enraged by police brutality and a collapsing economy, took over Tahrir Square – the heart of Cairo’s police state. It was Ramy Essam’s moment. In a remarkable communion with the crowd, his spine-tingling song, Irhal, became the rallying cry for an entire generation. And when the dictator Hosni Mubarak resigned, they couldn’t believe their success – but nor could they predict what would happen next. Ramy and the writer Mona Seif, who covered the events firsthand, take us back to those fateful days when Egypt, and the entire Arab world, chose its future