Salam Fayyad passes through an Israeli checkpoint in the West Bank town of Hebron in January. This week, he resigned from his post as prime minister of the Palestinian Authority. Hazem Bader/AFP/Getty Images hide caption

itoggle caption Hazem Bader/AFP/Getty Images

Palestinian Authority head Mahmoud Abbas delivers a speech in Cairo on May 4, 2011 during a Palestinian unity ceremony. THAER GHANEM/AFP/Getty Images hide caption

itoggle caption THAER GHANEM/AFP/Getty Images