Egyptians gather in Tahrir Square during a demonstration against President Mohammed Morsi in Cairo on Sunday. Hundreds of thousands of Morsi opponents poured out onto the streets across much of Egypt, launching an all-out push to force him from office on the first anniversary of his inauguration. Amr Nabil/AP hide caption

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Thousands of protesters who oppose Egyptian President Mohammed Morsi were in Cairo's Tahrir Square on Sunday. Mohamed Abd El Ghany /Reuters/Landov hide caption

itoggle caption Mohamed Abd El Ghany /Reuters/Landov

Opponents of Egypt's President Mohammed Morsi burn the contents of an office of the Freedom and Justice Party, an arm of the Muslim Brotherhood, in Alexandria Friday. Two people were reportedly killed in clashes in the city. STR/AFP/Getty Images hide caption

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Egyptian employees of the Cairo Opera House and opponents of Egypt's Islamist President Mohamed Morsi hold placards during a demonstration inside the opera's compound in Cairo on May 30, following the dismissal of the head of the opera house. The firing is the latest salvo in a cultural war between artists and the ruling Muslim Brotherhood. Khaled Desouki/AFP/Getty Images hide caption

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A May 28 photo shows the Blue Nile in Ethiopia, during a diversion ceremony for the country's dam project. Egypt says it is against the plan. AFP/AFP/Getty Images hide caption

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The metal in an Egyptian iron bead dating from around 3,300 BC has been found to have originated from space, according to analysis. Here, the bead is seen in (clockwise from top left) a photograph, a CT cross-section view, a model of nickel oxides, and a model in which blue areas represent the rich presence of nickel inside the bead. The Open University/University of Manchester hide caption

itoggle caption The Open University/University of Manchester

Egyptian folk singer Dina El Wedidi performs at Qasr El Nil Theater during the Downtown Cairo Arts Festival. Wedidi says efforts to revitalize venues like the Qasr El Nil are important because there aren't enough places for musicians of the post-revolution explosion to perform. Mostafa Abdel Aty/Courtesy of Downtown Contemporary Arts Festival hide caption

itoggle caption Mostafa Abdel Aty/Courtesy of Downtown Contemporary Arts Festival

Ousted Egyptian President Hosni Mubarak, waves from behind his son, Alaa, during the opening session of Mubarak's retrial in Cairo on Saturday. AFP/Getty Images hide caption

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A bodyguard secures popular satirist Bassem Youssef, who has come to be known as Egypt's Jon Stewart, as he enters Egypt's state prosecutors office on Sunday. Amr Nabil/AP hide caption

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