Photographer: Jim Bourg/Pool/AFP via Getty Images Iran has for the first time sent President Hassan Rouhani’s younger brother as a special observer to the nuclear talks in Vienna, signaling the importance of the final week of negotiations before a July 20 deadline. The presence of Hossein Fereydoun, who also serves as a special adviser to the president, came to light after he was photographed in one of the sessions between Iran and European foreign ministers. Fereydoun’s presence was also reported by Iran’s state-run Islamic Republic News Agency . “He’s the president’s eyes and ears,” Ali Vaez, an Istanbul-based analyst for the International Crisis Group , said in an e-mailed reply to questions. Thirteen days into negotiations between world powers and Iran, significant gaps remain over the Persian Gulf nation’s uranium-enrichment capacity. U.S. Secretary of State John Kerry arrived in the Austrian capital yesterday along with his counterparts from France, […]