Key Speakers Address The 72nd Session Of The United Nations General Assembly [Getty Images]

Hassan Rouhani, Iran's president, exits the podium after speaking during the UN General Assembly meeting in New York, U.S., on Wednesday, Sept. 20, 2017. Rouhani rejected any U.S.-led effort to alter the 2015 nuclear agreement that President Donald Trump has labeled "the worst deal ever" and signaled he may walk away from, a move the Islamic Republic's leader said would only damage U.S. credibility. Photographer: Caitlin Ochs/Bloomberg via Getty Images

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