Photo - An Egyptian election worker shows his colleagues an invalid ballot while counting ballots at the end of the second round of a referendum on a disputed constitution drafted by Islamist supporters of president Mohammed Morsi at a polling station in Giza, Egypt, Saturday, Dec. 22, 2012. Egypt's Islamist-backed constitution headed toward likely approval in a final round of voting on Saturday, but the deep divisions it has opened up threaten to fuel continued turmoil. (AP Photo/Nasser Nasser)
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