Iran has agreed to allow United Nations inspectors to visit the military facility at Parchin that the United States alleges is linked to a secret nuclear weapons program. The head of the UN's International Atomic Energy Agency told journalists today that he expects UN experts to visit Parchin, some 30 kilometres southeast of Tehran "within days or weeks." IAEA chief Mohamed El-Baradei said details of the visit are still being worked out with Iranian officials. Iran denies conducting any research into building nuclear weapons. Some countries, notably the United States, questions this position and point out that Iran's wealth in oil and gas supplies means it has no need to develop nuclear energy for civilian use.