Egyptian demonstrators hold the flags of Arab nations at Cairo’s Tahrir Square on May 13, 2011 during a protest calling for national unity after attacks on Egyptian churches, and solidarity with the Palestinians as they mark the “Nakba” or “catastrophe” which befell them following Israel’s establishment in 1948. AFP PHOTO / KHALED DESOUKI (Photo credit should read KHALED DESOUKI/AFP/Getty Images)
