The Islamic Republic of Iran has demonstrated a long pattern of obstruction regarding inquiries and investigations into its nuclear activities, and that pattern persists more than two years after the conclusion of a landmark nuclear agreement between Iran and six world powers.

The conclusion of that agreement in 2015 was to some extent dependent upon the neglect of certain controversial issues, including access to Iranian military sites, where the regime apparently carried out research and development related to weaponization aspects of the country’s nuclear program. The Joint Comprehensive Plan of Action effectively skirted this issue by making it theoretically possible for the International Atomic Energy Agency to ask for and receive access to military sites, but only following a month-long process during which the Islamic Republic could work to erase evidence of past activities.