Inside Story - A new frontier in cyber war?

Stuxnet has been described as a new class of computer virus, the most refined piece of malware ever discovered, the world's first cyber super-weapon. It is the first known worm capable of taking control of industrial systems. It could disable the safety systems at a nuclear power plant, contaminate fresh water supplies at a treatment facility, and take over control of oil or gas pipelines. So who is behind this powerful piece of malware? And is the world witnessing a new frontier in cyber war?