This clarification is an important part of the debate over what the US should do about Iran. There is still a question as to whether or not Iran is actually seeking to build its own deliverable nuclear weapons. The evidence observed so far by the IAEA does not support a conclusion that the Iranian nuclear program is a weapons program but the question is still open. It seems to me that Iran is probably about three years away from the ability to produce a nuclear explosion in a static test situation. If that occurs then the realities of engineering and manufacturing a nuclear weapon that "mates" with a ballistic missile available to them would probably take five more years.
There is a lot of "elbow room" in this process for diplomacy.
If, on the other hand, the beginning of strikes on Iran is to be justified on the basis of IRGC actions in Iraq, then anything is possible at any time. pl