Iran’s release of 10 United States Navy sailors on Wednesday, less than 24 hours after they were detained on the Persian Gulf, is being hailed in both countries as a sign that their relations have evolved since the signing of the nuclear accord last summer.<br />Secretary of State John Kerry thanked the Iranians “for their cooperation in swiftly resolving this matter” and suggested in a statement that the quick resolution of the issue was a product of the nearly daily back-and-forth that now takes place between Washington and Tehran, after three decades of hostility and stony silence.<br />The crew members of two patrol boats were detained on Tuesday after what Iranian state news media described as “trespassing” in Iranian waters near a major naval base.