New evidence shows Stuxnet used since at least 2007

Researchers from security firm Symantec have found and analyzed a version of the Stuxnet cybersabotage malware that predates previously discovered versions by at least two years and used a different method of disrupting uranium enrichment processes at Iran's nuclear facility at Natanz.

Story added 26. February 2013, content source with full text you can find at link above.