CAIRO (AFP) – Every night in the run-up to Christmas thousands of Egypt's Coptic Christians have been gathering in a Cairo suburb eager for a glimpse of a vision that has given hope to their marginalised community. It is three hours past midnight in Al-Warrak, a poor working class neighbourhood of the Egyptian capital, and a 10,000-strong crowd is silently staring at the sky. Then the appearance of a mysterious light over the church tower jolts the gathering into a frenzy of cries and ululations. It is the apparition of the Virgin Mary, they say. Thousands have been coming nightly...