Iran’s foreign minister made a rare visit to the U.S. capital Wednesday on a visa granted with unusual speed by the State Department one day before the start of nuclear talks in Geneva. State Department spokesman P.J. Crowley played down the significance of the U.S. decision to permit the visit by Manouchehr Mottaki, even though it marked the first time in years that a senior Iranian official has visited Washington. “I wouldn’t read too much into this,” Crowley said.