An Egyptian Christian holds a banner next to a Muslim holding a Koran as they protest against what they say is the failure of authorities to protect them, in Cairo January 3, 2011 after a suspected suicide bomber killed 21 people and wounded 97 outside a Coptic church in the Nile delta city of Alexandria during a New Year's midnight service. Egypt is screening people who arrived recently from countries where al-Qaeda is known to recruit after early findings suggested the militant network was behind the bombing, security sources said. The banner reads, "No to terrorism". Picture taken January 3, 2011.