TEHRAN, IRAN - MAY 19: (----EDITORIAL USE ONLY MANDATORY CREDIT - "IRANIAN PRESIDENCY / HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) Iran's current President and presidential candidate Hassan Rouhani casts his ballot at Husayniyyah-yi Irshad polling station during Iran's 12th presidential election, in Tehran, Iran on May 19, 2017. (Photo by Presidency of Iran / Handout/Anadolu Agency/Getty Images)
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