In this Tuesday July 11, 2017 photo U.S. Secretary of State Rex Tillerson, left, and the Qatari Minister of Foreign Affairs Sheikh Mohammed bin Abdulrahman Al Thani sign an memorandum of understanding in Doha, Qatar. Tillerson arrived in Qatar as he tries to mediate a dispute between the energy-rich country and its Gulf neighbours. (Alexander W. Riedel/US State Department via AP)
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