Mahmoud el-Deeb, 77, plays music as he sits at a traditional tent while marking the Nakba Day in Zaneh, neighborhood east of Khan Younis, in the southern Gaza Strip, Friday, May 15, 2015. Palestinians marked the Nakba Day, or the Day of the Catastrophe, when hundreds of thousands of Palestinians were expelled from their towns during the first Israeli-Arab war in 1948. (AP Photo/Adel Hana)