I just started reading this book and it's been pretty interesting/worrisome.
Countdown to Crisis: The Coming Nuclear Showndown with Iran
One thing that chaps my ass is how other countries, Germany comes to mind, have amazingly loose rules on shipping technology out of their country. There are some companies there that certainly knew what there equipment was being used for and went out of their way to hide the shipments from their .gov.
Anyway, so far it's a pretty good read.