We know that Iran did a very preliminary investigation in the late 1980s, and very early 1990s. We also know that they seem to have entertained the idea of a bomb project during 2002-3 when Bush was on his rampage of conquest and threatening to conquer Iran after Iraq. We know that Iran is pursuing the essential industrial ability. And we know that Iran is still refusing to return to the Additional Protocols. Have they made a decision to create nuclear weapons? There is no evidence that shows that. There is the distinct possibility they are working towards a Break Out capability.
Poland's central bank head calls story of Nazi train find a hoax (Reuters)
from the article: MI chief: Iran has enough nuclear material for bomb