AUG. 14, 2002 -- An opposition group of exiles reveals that Iran has a uranium enrichment facility and a heavy-water plant.
SEPT. 12, 2003 -- The International Atomic Energy Agency calls on Iran to suspend all enrichment-related activities.
OCT. 21-23, 2003 -- After negotiations with France, Britain and Germany, representing the European Union, Iran agrees to halt all enrichment and reprocessing activities.
MARCH 13, 2004 -- The I.A.E.A. criticizes Iran for failing to report centrifuge research and suspend all activities.
APRIL 29, 2004 -- Iran tells the I.A.E.A. that it is starting to convert uranium, a step toward enrichment.
SEPT. 18, 2004 -- The I.A.E.A. tells Iran to cease uranium conversion, and implicitly threatens referral to the United Nations Security Council.
NOV. 15, 2004 -- After negotiations with E.U. representatives again, Iran agrees to stop enrichment activities.
JULY 2005 -- American officials show I.A.E.A. leaders what they say are detailed designs for a nuclear warhead obtained from an Iranian laptop computer.
SEPT. 2, 2005 -- The I.A.E.A. says that Iran has not fully cooperated with the agency, despite repeated requests and visits by inspectors.
NOV. 18, 2005 -- The I.A.E.A. reports that Iran was offered information in 1987 that could have helped it cast uranium into the shapes needed to build the core of a nuclear bomb.
JAN. 12, 2006 -- Britain, Germany and France call off nuclear talks with Iran.
FEB. 4, 2006 -- The I.A.E.A. board votes to report Iran's nuclear case to the Security Council.
APRIL 11, 2006 -- Iran says it has succeeded in enriching uranium.
(Source by International Institute for Strategic Studies)
