In June 2010, a new computer software “worm” called Stuxnet, described as the most sophisticated cyber weapon ever made, was publicly identified by a security company in Belarus. A German industrial company subsequently confirmed that a number of its control systems technologies that are used in the power industry and which control valves, pipelines and other industrial equipment in different facilities around the world had been affected by the worm. Stuxnet targets software called WinCC, which runs on Microsoft Windows, in very specific industrial equipment and only attacks when it finds the right match. Such systems are used in the Iranian nuclear facilities at Bushehr and Natanz, Iran, and the Iranian government subsequently confirmed that computers there had been infected. Inspectors from the Atomic Energy Authority also found that a significant number of Iran’s centrifuges – used in the uranium enrichment process – were idle. Experts say that the worm is too sophisticated to have been the work of ordinary hackers or criminals – nor would they have had the significant time and funding required. Hence it is regarded as a cyber attack by an as yet undeclared state or states against another’s nuclear facilities, and at least one country has changed its estimate of the nuclear threat level from Iran from “imminent” to 2015.