Iran continues to prevent inspectors from the UN nuclear agency from accessing its nuclear facilities, thus denying them the ability to verify the location and status of uranium stockpiles enriched to near weapons-grade levels. This emerges from an internal agency report obtained by The New York Times. In the 11-page report, Rafael Grossi, head of the International Atomic Energy Agency (IAEA), wrote that "the absence of information on this material and the limited access to facilities for its verification raise deep concerns from a nuclear weapons proliferation perspective."