Stuxnet an Instance of Cyber War?

Damage from the Stuxnet virus has apparently set back the Iranian nuclear program by as much as two years, according to a German security expert interviewed by the Jerusalem Post, and may be an instance of cyber warfare.

http://www.jpost.com/IranianThreat/News/Article.aspx?id=199475

Stuxnet is a Windows-specific computer worm first discovered in July 2010 by a security firm based in Belarus, according to Wikipedia. While it is not the first time that hackers have targeted industrial systems, it is the first discovered worm that spies on and reprograms industrial systems.

It is said to have been specifically written to attack Supervisory Control And Data Acquisition systems used to control and monitor industrial processes.

http://en.wikipedia.org/wiki/Stuxnet

Stuxnet includes the capability to reprogram Programmable Logic Controllers and hide its changes.The worm's probable target is said to have been high value infrastructures in Iran using Siemens control systems.

Stuxnet apparently as effective as a military strike