An Iranian man walks past a mural displaying an outline of Iran, adorned in the colors of the country's national flag, on June 29 in Tehran. A large majority of Iranians appears to support the nuclear deal. Bherouz Mehri/AFP/Getty Images hide caption

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Iranian workers transfer goods from a cargo container to trucks in May at the Kalantari port in Chabahar, Iran. The removal of sanctions on Iran under a recent deal with world powers is expected to boost the country's economy, but the agreement was carefully constructed to quickly put those sanctions back in place if Iran is suspected of violations. Atta Kenare/AFP/Getty Images hide caption

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A man walks past a poster advertising travel to Tehran, Iran, in Los Angeles on July 14. A nuclear deal between Iran and six world powers lifts some sanctions against Iran, but most U.S. sanctions will remain in place. Lucy Nicholson/Reuters/Landov hide caption

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President Obama hosts leaders of the Gulf Cooperation Council at Camp David, Md., on May 14. The president gave assurances that the U.S. would support its allies in the region concerned over Iran's growing influence. Andrew Harnik/AP hide caption

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Iranian oil workers gather at an oil refinery south of the capital Tehran, Dec. 22, 2014. Iran's oil exports have been crippled by sanctions. Vahid Salemi/AP hide caption

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People gather around a car as it is removed by a mobile crane in Tehran, Iran. The car was being driven by Iranian nuclear scientist Mostafa Ahmadi Roshan when it was targeted by a bomb Wednesday. Roshan was killed in the blast. Meghdad Madadi/AP hide caption

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Iranian protesters breached the gates of the British embassy in Tehran on Tuesday, tearing down the British flag and ransacking offices. Atta Kenare/AFP/Getty Images hide caption

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