An elderly Palestinian gestures, as he carries a poster of Palestinian President Mahmoud Abbas, right, as another carries one of late leader Yasser Arafat, left, during a march in Beirut, Lebanon, Friday, May 15, 2009. The rally was organized by the Palestinian Liberation Organization marking the 61st anniversary of the displacement of hundreds of thousands of Palestinians who either fled or were driven out of their homes during the 1948 war over Israel's creation. Palestinians call it their "nakba," Arabic for catastrophe.