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
President Mohammed Morsi
Egyptians shelter behind columns after police exchanged gunfire with supporters of ousted president Mohamed Morsi holed up inside a Cairo mosque on Friday. Mohamed El-Shahed/AFP/Getty Images hide caption
A man in Cairo who said he had been wounded by a rubber bullet Friday gets help. Andre Pain/EPA/LANDOV hide caption
President Obama, speaking Thursday from the island of Martha's Vineyard, Mass., said the U.S. has canceled joint military exercises with Egypt. Jacquelyn Martin/AP hide caption
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
Supporters of deposed Egyptian President Mohamed Morsi attend a Friday rally in Cairo. Ahmad Gharabli/AFP/Getty Images hide caption
Egyptian President Mohammed Morsi held a "dialogue" in Cairo on Saturday. Overnight, an official announced the president would nullify a decree that gave him expanded powers. Maya Alleruzzo/AP hide caption
Protesters gather in Tahrir Square in Cairo, Egypt, on Tuesday. Tens of thousands of Egyptians also gathered outside the presidential palace in Cairo in demonstrations that turned violent as tensions grew over President Mohammed Morsi's seizure of nearly unrestricted powers. Maya Alleruzzo/AP hide caption