Hans Blix, The Guardian Should we be worried? The International Atomic Energy Agency has reported that the Iranians' uranium enrichment programme is proceeding, though perhaps at a slower pace. Iran is not answering questions raised by western intelligence. The IAEA cannot exclude the possibility that the Iranian programme has military aspects. So, yes, there should be concern, but there is even more reason to be distressed that this has been going on for years in full view, yet has not been met with effective diplomacy.