Palestinians wave national flags on May 15, 2016 in Gaza city during a rally to commemorate the "Nakba" or "catastrophe" in Arabic in reference to the establishment in 1948 of the state of Israel. "Nakba" means in Arabic "catastrophe" in reference to the birth of the state of Israel 68-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 Ashraf Amra