Google executive Wael Ghonim, who emerged as a leading voice in Egypt's uprising, was barred from the stage in Tahrir Square on Friday by security guards, an AFP photographer said. Ghonim tried to take the stage in Tahrir, the epicentre of anti-regime protests that toppled President Hosni Mubarak, but men who appeared to be guarding influential Muslim cleric Yusuf al-Qaradawi barred him from doing so. Ghonim, who was angered by the episode, then left the square with his face hidden by an Egyptian flag. Qaradawi gave a Friday sermon in the square, where hundreds of thousands of people gathered a...