FILE - In this Thursday, Jan. 12, 2017 file photo, a worker operates valves in Nihran Bin Omar field north of Basra, Iraq. An Iraqi oil official says employees of energy giant Exxon Mobil have started evacuating an oil field in the southern province of Basra, amid rising tensions between the United States and Iran. The first group left two days ago and another batch left early Saturday May 18, 2019. (AP Photo/Nabil al-Jurani, File)
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