An Iranian official told Al Jazeera that Tehran rejects a significant part of U.S. demands, which include complete destruction of nuclear facilities at Fordow, Natanz and Isfahan and the transfer of all enriched uranium in its possession to the United States. "Our proposal includes technical and practical steps and proof that we do not want nuclear weapons. Our proposal affirms that uranium enrichment is a sovereign right and proposes a temporary freeze on enrichment for a limited period," he said. According to him, "The principle of zero uranium enrichment forever, dismantling of nuclear facilities and the transfer of uranium stockpiles is completely rejected."