, that maybe that first version of stuxnet actually was planted at natanz. and then maybe they lost that access in subsequent versions, and that may have been the reason why they had to add zero days to spread it. >> host: kim zetter has been with "wired" magazine since 2003. prior to that at pc world. ms. zetter, are you a techie? >> guest: no. [laughter] no, i got into tech journalism by, you know, not by choice and then found that i really loved it. i don't particularly like gadgets in particular or computers in the sense of, you know, taking them apart and programming, things like that, but i love issues around computers, the issues around cybersecurity and privacy issues and civil liberties. those are the things that attract me. >> host: and what was it about stuxnet that fascinated you enough to write a book? >> guest: well, it multifaceted. it wasn't a simple worm, and it wasn't a simple attack, and it was unlike anything we'd seen before. there were multiple ways of coming at this story that fascinated me, and i was also fascinated by the opportunity