Parchin Complex, 30 kilometers southeast of Tehran, was the site for the implementation of a variety of defense projects. Parchin was the center of the Defense Industries Organization's (DIO) Chemical industry, and, possibly, the home of the main producers of the Iran’s missiles...
On 17 September 2004 IAEA head El Baradei said his organization had found no sign of nuclear-related activity at the Parchin site in Iran, which several US officials had said might be to secret nuclear weapons research. Iran allowed IAEA inspectors to visit the Parchin military site in the interests of transparency, but the visit was limited to only few areas.
On 1 March 2005, Iran abandoned a second request by the IAEA to visit again the Parchin site. However, the IAEA was eventually allowed entrance to the Parchin facility in November 2005. The IAEA did not observe any unusual activities in the buildings visited, and the results of the analysis of environmental samples did not indicate the presence of nuclear material.