In a significant move, Iran agreed Sunday to provide additional information sought by the U.N. nuclear agency in its long-stalled probe of suspicions that Tehran may have worked on nuclear weapons.
  
U.N’.s International Atomic Energy Agency was pushing ahead with its investigation with expectations that Tehran would continue to assert that all of its activities it is ready to reveal were meant for peaceful nuclear use.
Still, the IAEA’s announcement that Tehran was ready to “provide information and explanations” for experiments in a type of detonator that the agency says could be used to trigger a nuclear explosion appeared to be the latest indication of the series of retreating steps taken by mullahs’ regime
 
The agency mentioned its concerns about detonator development three years ago as part of a list of activities it said could indicate that Tehran had secretly worked on nuclear weapons.
 
The technology had “limited civilian and conventional military applications,” it said back then, adding: “given their possible application in a nuclear explosive device … Iran development of such detonators and equipment is a matter of concern.”
 
The detonator issue was not on top of the list of the 2011 IAEA report of possible nuclear weapons concerns, with the agency mentioning other suspected activities that it said appeared to have had no civilian applications.
 
Among the suspected activities are: indications that Iran has conducted computer modeling of a core of a nuclear warhead, suspected preparatory work for a nuclear weapons test, and development of a nuclear payload for Iran’s Shahab 3 intermediate range missile a weapon that can reach Israel, information that Iran went further underground to continue work on nuclear weapons development past 2003, the year that U.S. intelligence agencies believe such activity ceased.