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JERUSALEM - MARCH 30: Palestinians gathered at the Damascus Gate and Saladin streets march to commemorate the Land Day, in Jerusalem on March 30, 2015. Land Day, celebrated on March 30 of each year, dates back to 1967, when six Palestinians were killed by Israeli gunfire during demonstrations that broke out against Israel's seizure of thousands of square kilometers of Arab land. (Photo by Turgut Alp Boyraz/Anadolu Agency/Getty Images)

JERUSALEM - MARCH 30: Palestinians gathered at the Damascus Gate and Saladin streets march to commemorate the Land Day, in Jerusalem on March 30, 2015. Land Day, celebrated on March 30 of each year, dates back to 1967, when six Palestinians were killed by Israeli gunfire during demonstrations that broke out against Israel's seizure of thousands of square kilometers of Arab land. (Photo by Turgut Alp Boyraz/Anadolu Agency/Getty Images)