https://translate.google.de/translat...chungsmanoever
Written in autumn 2016. The author is a retired German ministerial director, was head of the planning staff in the Federal Ministry of Defense from 1982 to 1988. He is seen as one of the leading experts for nuclear security risks and was awared German, French and American decorations and medals in recognition of his expertise and service.
https://de.wikipedia.org/wiki/Hans_R%C3%BChle
He also says in a more recent article that the socalled nculear deal never had a chance to accheive the claimed goal of banning Iran for 10-15 years from getting nuclear weapons. The article is locked and payware, unfortunately, so i cannot link and translate it.