Palestinians take part in a rally to commemorate the 69th anniversary of the "Nakba" in Gaza City, on May 15, 2017. "Nakba" means in Arabic "catastrophe" in reference to the birth of the state of Israel 69-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. The key symbolises the homes left by Palestinians in 1948. Photo by Ashraf Amra