A tear gas canister is fired by Egyptian riot police into the compound of the Coptic Orthodox Cathedral after the funeral of four Christians killed in sectarian clashes near Cairo over the weekend in Cairo, Egypt, Sunday, April 7, 2013. Attacks against Christians, who make up about 10 percent of Egypt's estimated 90 million people, have increased since President Morsi's Muslim Brotherhood came to power last year. (AP Photo/Mostafa El Shemy)
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