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 . The IAEA board has been trying to negotiate cooperation from Iran for years . Several diplomats met with Iranian years ; more meetings scheduled over years .
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 .