Iran's supreme leader Ayatollah Ali Khamenei said he will not allow any "retreat" on its rights, ahead of a new round of talks with world powers on Tehran's nuclear programme. “I insist on stabilising the rights of the Iranian nation, including the nuclear rights,” Khamenei told militiamen of the Basij force in Tehran, in remarks broadcast live on state television. “I insist on not retreating one step from the rights of the Iranian nation,” he added.