Muslim brotherhood supporters throw rocks at a protest to mark the second anniversary of the military's overthrow of Islamist President Mohammed Morsi, Giza, Egypt, Friday, July 3, 2015. When he led the army's overthrow of Egypt's Islamist president two years ago, Abdel-Fattah el-Sissi promised to usher in new stability for the country. Instead, now President el-Sissi is facing an even tougher challenge: An Islamic militant insurgency that unleashed its worst violence yet the past week. (Photo by Amr Sayed/AP Photo)
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