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US President Barack Obama (L) chats with the emir of Qatar Sheikh Tamim bin Hamad al-Thani (C) and Bahrain's Crown Prince Salman bin Hamad al-Khalifa during a summit meeting at Camp David in Maryland on May 14, 2015. AFP PHOTO/NICHOLAS KAMM (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)

US President Barack Obama (L) chats with the emir of Qatar Sheikh Tamim bin Hamad al-Thani (C) and Bahrain's Crown Prince Salman bin Hamad al-Khalifa during a summit meeting at Camp David in Maryland on May 14, 2015.     AFP PHOTO/NICHOLAS KAMM        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)