Palestinian Authority head Mahmoud Abbas delivers a speech in Cairo on May 4, 2011 during a Palestinian unity ceremony.
THAER GHANEM/AFP/Getty Images
May 4, 2011 The rival Palestinian political factions have agreed to reconcile after four bitter years of infighting and turmoil. The Hamas and Fatah groups met in Cairo to formally approve the agreement that calls for unified Palestinian elections next year.
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