Palestinians carry a symbolic key with Arabic that reads, "we are coming back Palestine" to mark the passing of 69 years since what Palestinians call their "nakba," or catastrophe, in front of a UN office, in Gaza City, Monday, May 15, 2017. Thousands of Palestinians marked the anniversary of their uprooting almost seven decades ago when hundreds of thousands of Palestinians fled or were driven out in the Mideast war over Israel's 1948 creation. (AP Photo/Adel Hana)

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