One thing you should know about Stuxnet that I can talk about publicly (I used to work for Siemens) is that it was an attack vector on part of the SCADA RTU drivers that ran on a very old and unpatched version of WindowsNT. People running an nuke plant on something that old (which is typical of Iran, considering how their politics have isolated them over the last 30 years) are kinda asking to get hacked like this.

Of course I'm not saying that this means the problem you're talking about isn't real: security is a real concern, especially with SCADA systems running energy plants. Just putting in some perspective.