In this undated photo provided by the office of the Iranian President, Hamid Aboutalebi, an Iranian diplomat, who was recently named as Iran’s ambassador at the United Nations, sits in his office in Tehran, Iran. Iran has no plans to name a new diplomat to the United Nations, its Foreign Ministry said Saturday April 12, 2014, after the United States blocked its pick in a rare rebuke that could stir fresh animosity at a time when the two countries have been seeking a thaw in relations. The Obama administration said Friday that the U.S. had informed Iran it would not grant a visa to Hamid Aboutalebi, a member of the group responsible for the 1979 takeover of the U.S. Embassy in Tehran. (AP Photo/Iranian Presidency, Mohammad Berno)