Stuxnet Virus in Japan, Fukushima Gremlin?

Some are saying this whole Japan nuke plant blow up is a result of covert warfare and not from natural causes.
The US-made computer virus Stuxnet gets mentioned. The US bragged they had infected Iran’s computers with it with Israel’s help to stop nuke research there.
In an earlier post here there’s a video clip of nuke scientist, Dr. Leuren Moret, talking about  Stuxnet also.

Here’s a mention in Yomiuri Shimbun from last October about   Stuxnet in Japan. The suspect thing about the virus is it can do its attack by being imported into a “secure” system by USB stick. It can infect electric co. utilities that are not connected to the internet this way.

http://www.yomiuri.co.jp/dy/national/T101004003493.htm 

And this video clip has a little more but doesn’t list sources for the claim “… a Israel Security team came to the plant only a month after the MOX fuel was inserted into Unit 3 and infected the computers there.”     http://youtu.be/LQI_tah5Phs

But, hey, we found this blog item on that topic- 

Israeli Security Firm in Charge at Japanese Nuke Facilities Prior to Disaster 

http://theuglytruth.wordpress.com/2011/03/18/israeli-security-firm-in-charge-at-japanese-nuke-facilities-prior-to-disaster/ 

The above seem to be using this article from Haaretz for their info on the Israel security company-  http://www.haaretz.com/print-edition/news/israeli-firm-which-secured-japan-nuclear-plant-says-workers-there-putting-their-lives-on-the-line-1.349897