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Crowds of protesters gather around Wael Ghonim during the July 8 sit-in of Tahrir square in Cairo, Egypt, on July 13, 2011. Wael Ghonim was a quiet force behind the YouTube and Facebook campaigns that galvanized Egyptian protesters in January 2011, but became a potent symbol for the movement’s young organizers after he disappeared on Jan. 28. When a live television interview with Mr. Ghonim was broadcast on an Egyptian satellite channel on Feb. 7, only two hours after his release from an Egyptian prison, he became an instant icon.