Saudis wave and cheer as the convoy of King Abdullah of Saudi Arabia passes through the streets of Riyadh on Wednesday. As the king returns from three months of medical treatments, he faces increasing demands for political reform. Hassan Ammar/AP hide caption

itoggle caption Hassan Ammar/AP

Saudi students sit for their final high school exams at the end of the school year June 19 in the Red Sea port city of Jeddah. Amer Hilabi/AFP/Getty Images hide caption

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A shop in Cairo's Tahrir Square is spray-painted with the word "twitter" on Feb. 4, days after the Egyptian government blocked Internet access. Peter Macdiarmid/Getty Images hide caption

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Fahad Albutairi, 25, is a geologist and stand-up comedian. Deborah Amos/NPR hide caption

itoggle caption Deborah Amos/NPR

Ahmed al-Omran, a 22-year-old Saudi university student, checks his Internet blog on his laptop computer at a cafe in Riyadh, Saudi Arabia, on June 5, 2006. Fahd Shadeed/AFP/Getty Images hide caption

itoggle caption Fahd Shadeed/AFP/Getty Images