Iran is trying to be as cooperative as possible with the UN investigation of its nuclear program, particularly in unraveling the workings of the international black market which supplied it, senior Iranian negotiator Cyrus Nasseri told AFP.Reacting to UN criticism that Iran has not supplied “sufficient” information on this topic, Nasseri said that Iran was “looking to help the IAEA close that issue.” He said that since the beginning of the agency’s investigation in 2003, “Iran has tried to be as cooperative as we could be.”Full Story