In the eighteenth century it was often convenient to regard man as a clockwork automaton. In the nineteenth century, with newtonian physics pretty well assimilated and a lot of work in thermodynamics going on, man was looked on as a heat engine, about 40 per cent efficient. Now in the twentieth century, with nuclear and subatomic physics a going thing, man had become something which absorbs x-rays, gamma rays and neutrons.
As far as u.S. Intelligence knows, iran is developing nuclear capacities, but they don't know if they are trying to develop nuclear weapons or not. Chances are they're developing what's called 'nuclear capability,' which many states have. That is the ability to have nuclear weapons if they decide to do it. That's not a crime.