Demonstrators release black balloons on May 16, 2008 in the center of Brussels during a demonstration marking the 60th anniversary of Naqba or 'catastrophe' that lead to the expulsion or flight of some 760,000 people from what was once Palestine and consequently the birth of the Jewish state of Israel. Getty Images logo Getty Images 18 months ago

Demonstrators release black balloons on May 16, 2008 in the center of Brussels during a demonstration marking the 60th anniversary of Naqba or 'catastrophe' that lead to the expulsion or flight of some 760,000 people from what was once Palestine and consequently the birth of the Jewish state of Israel.