Gen. Hassan Firouzabadi will sue over being placed on the sanctions list in 2011.

Access for diplomats and others to the Parchin base would be an attempt by Iran to show openness.

The facility is now hidden from spy satellites; its cleanup can no longer be monitored.

After failed talks in June, the IAEA will open new dialogue with the Islamic state.

Iran's president on Tuesday unveiled an upgraded version of a short-range surface-to-surface ballistic missile just weeks after it was test-fired, the country's state-media reported.