In the first of a two-part special from Egypt, which is in the grip of post-revolution anxiety. The center of gravity has shifted from the young revolutionaries of Tahrir square to the Islamist parties that have swept the elections. Using a mix of exclusive interviews with key leaders of the Muslim Brotherhood, the ultraconservative Salafist sect of Islam, Amr Moussa - the man who may well be President of Egypt, and many more, as well as ground reportage, we attempt to tackle the questions that have resonance for Egypt, the Arab world, and beyond: what is the true nature and agenda of the Muslim Brotherhood? Will the Egypt model be replicated across the Arab spring? Or has Tahrir Square ensured that there is no place for intolerance of any kind - political or religious?