If the Iranians don't let the IAEA inspect military bases such as Parchin, how does the IAEA know what is going on in there? What if the person leaking information to the IAEA about alleged nuclear weapons work at Parchin is lying? There is still not a scrap of credible hard evidence to prove that Iran is trying to build nuclear weapons. Even if scientists are running software on computers to simulate nuclear explosions, there's no law against this. It doesn't mean that nuclear weapons are being built. It's time for Iran to draw a line in the sand and demand that in the absence of any hard evidence that it is building nuclear weapons, Irann will withdraw from the NPT and boot out the IAEA completely and shut down all monitoring at all nuclear sites unless all UN sanctions are dropped forthwith. And if any nation dares to attack Iran, then all options are on the table, including attacks in the attacker's home nations against any target that will bring the attacker to its knees.
U.S. sanctions Russia's state-owned arms exporter Rosoboronexport (Reuters)
from the article: An inside look at the base where Iran is developing nuclear weapons