Palestinian students prepare a big mural to mark the 63th anniversary of "Nakba" (catastrophe), in the West Bank city of Ramallah, on May 12, 2011. Nakba means "catastrophe" in reference to the birth of the state of Israel 63 years ago in British-mandate Palestine, which led to 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. Photo by Issam Rimawi