US Secretary of State John Kerry, second right, US Secretary of Energy Ernest Moniz, second left, and French Foreign Minister Laurent Fabius, right, meet at Palais Coburg Hotel, where the Iran nuclear talks are being held, in Vienna, Austria, Tuesday, July 14, 2015. After 18 days of intense and often fractious negotiation, diplomats Tuesday declared that world powers and Iran had struck a landmark deal to curb Iran's nuclear program in exchange for billions of dollars in relief from international sanctions, an agreement designed to avert the threat of a nuclear-armed Iran and another U.S. military intervention in the Muslim world. (Joe Klamar/Pool Photo via AP)