The director of the U.N.’s nuclear watchdog agency has expressed pessimism that Iran will adopt measures to increase transparency around its military facility at Parchin. The agency wants access to the site in order to investigate reports that Iran conducted activity there linked to the development of nuclear explosives. International Atomic Energy Agency (IAEA) Director-General Yukiya Amano described as “not bright” hopes that Tehran will permit investigators access to the site. Meetings last month aimed at convincing Iran to increase transparency around Parchin ended with some analysts and diplomats expressing hopes that Tehran was preparing to make limited concessions. Those hopes appear to be dimming.