American officials said on Monday that they were still negotiating with their Iranian counterparts on one of the main issues remaining in their efforts to reach a deal on Iran ’s nuclear program — how to dispose of Iran’s big nuclear stockpile — and that shipping the atomic fuel out of the country was still a possibility. The American officials were pushing back against public statements made on Sunday by Iran’s deputy foreign minister, Abbas Araqchi, that seemed to rule out an accord under which uranium would be sent abroad. Those comments represented an apparent change in position by the Iranian negotiators, who had […]