http://www.guardian.co.uk/technology/2010/sep/30/stuxnet-worm-new-era-global-cyberwar/print

Stuxnet worm heralds new era of global cyberwar

Attack aimed at Iran nuclear plant and recently revealed 2008 incident at US base show spread of cyber weapons.

The memory sticks were scattered in a washroom at a US military base in the Middle East< that was providing support for the Iraq war.

They  were deliberately infected with a computer worm, and the undisclosed  foreign intelligence agency behind the operation was counting on the  fallibility of human nature. According to those familiar with the  events, it calculated that a soldier would pick up one of the memory  sticks, pocket it and – against regulations – eventually plug it into a military laptop.

It was correct.