Yesterday while I was at the TransAtlantic Cyber Security Research Workshop in Washington, I had a chance to talk to a representative from Estonia (I will provide more details on the Workshop after I get the URL with the presentations. Paul de Souza has graciously provided his observations at http://paulcsfi.wordpress.com/2011/04/15/transatlantic-cybersecurity-research-workshop-at-the-hungarian-embassy/). In the process of explaining Stuxnet, a very important fact became clear.