IAEA says China is not allowing proper inspections of its nuclear program . The director 's report shows Iran has upgraded its uranium enrichment centrifuges . Iran has rebuffed UN requests for years . Several diplomats met with Iranian years ; more meetings scheduled over years .
IAEA says Iran is not allowing proper inspections of its nuclear program . The director 's report shows Iran has upgraded its uranium enrichment centrifuges . Iran has rebuffed IAEA requests for years . Several diplomats met with Iranians last week ; more meetings scheduled over next 5 weeks .