Palestinian President Mahmoud Abbas speaks in the West Bank town of Bethlehem on Oct. 1. Several days later, Abbas, 81, underwent an urgent cardiac test, but was soon released. The health scare has increased talk about a possible successor as the Palestinian leader. Majdi Mohammed/AP hide caption

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Majdi Mohammed/AP

Palestinians march Wednesday in Gaza City in support of an attempt to reconcile the two main factions. Those factions, Hamas and the Palestine Liberation Organization, have been bitterly divided since 2007. They hope to form a unity government within five weeks. Said Khatib/AFP/Getty Images hide caption

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Said Khatib/AFP/Getty Images

Oct. 29, 2004: Palestinian leader Yasser Arafat boards a helicopter in the West Bank city of Ramallah en route to a hospital in France. He died weeks later. Scott Nelson/Getty Images hide caption

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Scott Nelson/Getty Images