Who's Behind Computer Assault on Iran? - David Kay, National Interest

http://nationalinterest.org/commentary/the-worm-turns-4168
The thought of a nerdy computer worm bringing Iran’s nuclear program to an at-least-temporary standstill, something that repeated “red line” declarations from Washington, four sanction resolutions from the UN Security Council, and IAEA inspections and safeguards have failed to do, adds an element of comic irony to a dangerous challenge to global stability.