Palestinian children dressed in military fatigues hold toy rifles during a demonstration marking the 60th anniversary of the "Nakba" (Catastrophe) in the Palestinian refugee camp of Ain el-Helweh on May 14, 2008. "Nakba" refers to the expulsion or flight of an estimated 760,000 Arabs following the creation of the state of Israel in May 1948. Today, about 4.5 million refugees and their descendants live in camps in the Israeli-occupied West Bank, the besieged Gaza Strip, Jordan, Lebanon and Syria.