Iran's talks with European leaders have failed to bring Iran any closer to making concessions to halt the fight over its nuclear program as the Trump administration weighs whether to join Israel in its strikes on Iran. European countries have joined the Trump administration in demanding that Iran halt its nuclear fuel enrichment activities, increasing pressure on Tehran to agree to terms it rejected in this year's nuclear talks. Iran's foreign minister continued to insist on Friday that Iran has the right to enrich uranium, Arab and European officials briefed on the talks said. He also insisted that Iran would not reopen nuclear talks with the United States until Israel halted its attacks. "Iran is ready to consider diplomacy again once the aggression stops and the aggressor is held accountable for the crimes committed," he said after the talks. Israel, on the other hand, has shown no sign of being ready to halt the strikes that began a week ago. The Israeli army's chief of staff said on Friday that Israel must be ready for a protracted war with Iran.