[1]http://www.buzzfeed.com/jamesball/us-hacked-into-irans-critical-civi
   lian-infrastructure-for-ma#.bs1KQY7Nr
   Intro excerpt:

   A new documentary on “Stuxnet”, the joint U.S.–Israeli attack on Iran’s
   nuclear program, reveals it was just a small part of a much bigger
   cyber operation against the nation’s military and civilian
   infrastructure, under the code name “NITRO ZEUS”.

   The United States hacked into critical civilian and military
   infrastructure in Iran to allow its operatives to disable the country
   with a devastating series of cyberattacks at a moment’s notice, a
   documentary will claim this week.

   The targets of the U.S. hacking operations, covered by the code name
   “NITRO ZEUS”, include power plants, transport infrastructure, and air
   defenses, the film will state, with agents entering these protected
   systems nightly to make sure the attacks were still deployable.

   The film Zero Days by Oscar-winning director Alex Gibney, which is set
   to premiere at the Berlin film festival on Wednesday, will claim that
   the U.S.–Israel “Stuxnet” worm – which destroyed around 1 in 5 of the
   centrifuges used in Iran’s nuclear program – was just a small part of a
   much larger set of offensive capabilities developed against the nation.

References

   1. http://www.buzzfeed.com/jamesball/us-hacked-into-irans-critical-civilian-infrastructure-for-ma#.bs1KQY7Nr