FILE -- In this Feb. 10, 2011 file photo, a flag is waved by anti-government protesters as they demonstrate in Tahrir Square in downtown Cairo, Egypt. Seven years ago, Cairo’s Tahrir Square was filled with tens of thousands of Egyptians demanding cha
FILE - In this April 27, 2012 file photo, protesters at a rally for Hazem Abu Ismail, a former candidate in the Egyptian presidential election, hold a banner reading "no US aid American," in Tahrir Square in Cairo, Egypt. Washington’s surprise decisi
Anti-government protesters in Cairo's Tahrir Square wave shoes in dismay as President Hosni Mubarak speaks to the nation, Feb. 10, 2011.
PHOTO: In this Jan. 28, 2013 photo, Egyptian protesters use camera phones to capture a burning state security armored vehicle that demonstrators commandeered during clashes and brought to Tahrir Square and set it alight, in Cairo, Egypt.
PHOTO: Egyptian protesters shout slogans in Tahrir Square as the country awaits the outcome of a presidential runoff vote in Cairo, Egypt, Saturday, June 23, 2012.
PHOTO: Egyptian protesters shout slogans at a protest in Tahrir Square, Cairo, Egypt, June 8, 2012.
PHOTO: Tens of thousands of Egyptian protesters pack Cairo's landmark Tahrir Square, Nov. 22, 2011 as clashes between police and protesters demanding democratic change entered a fourth day.
PHOTO: Protesters demonstrate during clashes with Egyptian riot police, not pictured, near Tahrir Square in Cairo, Egypt, Nov. 22, 2011.
PHOTO Anti-government protesters take pictures of protest art in Tahrir Square, the center of anti-government demonstrations, in Cairo, Egypt
PHOTO Anti-government protesters chant slogans at the continuing demonstration in Tahrir Square, in downtown Cairo, Egypt, Feb. 11, 2011.