Iranian sanctions

The Iranian private airline Mahan Air uses Airbus planes, like the one pictured here at Yemen's Sanaa airport in 2015. Tehran is in talks with Airbus to buy more than 100 additional passenger planes. Hani Mohammed/AP hide caption

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

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

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

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

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

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