How the US missed Israel's nuclear program

On my first trip to Israel, in 1972, my father z"l (of blessed memory) took our family on a tour that started in Tel Aviv and ended in Eilat. On the way, we passed what you see pictured at the top. The guide told us that we were not to tell anyone what we saw there (all we did was drive past it) and that he would not tell us what it is. My father told me at the time that it was 'obviously' a