A man carries an Egyptian police officer to an ambulance after Friday's blast at the Egyptian police headquarters in downtown Cairo. Khalil Hamra/AP hide caption

itoggle caption Khalil Hamra/AP

Ballots are seen at a polling station in Cairo on Wednesday, the second day of voting in a referendum on a new constitution. Mohammed Bendari /APA /Landov hide caption

itoggle caption Mohammed Bendari /APA /Landov

Japan's Mizuho Financial Group Inc. said it had punished a total of 54 current and former executives over its loans to organized crime groups, but a third-party panel found no sign of a deliberate cover-up. Mizuho Bank president Yasuhiko Sato said his salary would be cut for six months and other executives would step down from their posts or face pay reductions. Frank Robichon/EPA /LANDOV hide caption

itoggle caption Frank Robichon/EPA /LANDOV

Egyptian soldiers stand guard in front of the constitutional court in Cairo. Al Youm Elsabaa newspaper /EPA/LANDOV hide caption

itoggle caption Al Youm Elsabaa newspaper /EPA/LANDOV

Crowds gather around the burning headquarters of the Muslim Brotherhood in Cairo on Oct. 27, 1954. The building was set on fire following the attempted assassination of President Gamal Abdel Nasser. AP hide caption

itoggle caption AP

An Egyptian army soldier stands Thursday amid the charred remains of the Rabaah al-Adawiya mosque, in the center of the largest protest camp of supporters of ousted President Mohammed Morsi, that was cleared by security forces in Cairo on Wednesday. Hassan Ammar/AP hide caption

itoggle caption Hassan Ammar/AP

Posters of ousted Egyptian President Mohammed Morsi lay amid the rubble of a protest camp in Cairo after Wednesday's crackdown by government forces. Ahmed Assadi/EPA/Landov hide caption

itoggle caption Ahmed Assadi/EPA/Landov

Protesters taunt security forces moving in to clear one protest camp near the Rabaa al-Adawiya mosque in Cairo. The military-backed government described the camps as violent and unlawful. Hesham Mostafa/EPA/Landov hide caption

itoggle caption Hesham Mostafa/EPA/Landov

Egyptian supporters of ousted President Mohammed Morsi demonstrate against the military-backed government in Cairo. Morsi, who has been detained since July 3, is in good health, a European official says. Fayez Nureldine/AFP/Getty Images hide caption

itoggle caption Fayez Nureldine/AFP/Getty Images

Muslim Brotherhood supporters of ousted President Mohammed Morsi attend a protest near Rabaa al-Adawiya mosque in Cairo on Friday. Mohammed Saber/EPA/Landov hide caption

itoggle caption Mohammed Saber/EPA/Landov