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GAZA, GAZA CITY - APRIL 9 : A group of Palestinians gathering at Gaza City's Tomb of the Unknown Soldier hold a protest demanding protection of Palestinian refugees and ending the clashes at Yarmouk Refugee Camp on April 9, 2015. (Photo by Ashraf Amra/Anadolu Agency/Getty Images)

GAZA, GAZA CITY - APRIL 9 :  A group of Palestinians gathering at Gaza City's Tomb of the Unknown Soldier hold a protest demanding protection of Palestinian refugees and ending the clashes at Yarmouk Refugee Camp on April 9, 2015. (Photo by Ashraf Amra/Anadolu Agency/Getty Images)