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Russia's Foreign Minister Sergey Lavrov (L), US Secretary of State John Kerry (C) and Saudi Foreign Minister Adel al-Jubeir stand together before a trilateral meeting on August 3, 2015 in Doha. Kerry is meeting his Gulf Arab counterparts for talks in Qatar as he attempts to ease the concerns of key allies over the Iran nuclear deal. AFP PHOTO/POOL/BRENDAN SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)

Russia's Foreign Minister Sergey Lavrov (L), US Secretary of State John Kerry (C) and Saudi Foreign Minister Adel al-Jubeir stand together before a trilateral meeting on August 3, 2015 in Doha. Kerry is meeting his Gulf Arab counterparts for talks in Qatar as he attempts to ease the concerns of key allies over the Iran nuclear deal. AFP PHOTO/POOL/BRENDAN SMIALOWSKI        (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)