A previously-unknown software flaw in a widely-deployed General Electric energy management system contributed to the devastating scope of the August 14th northeastern U.S. blackout, industry officials revealed this week.
Read full article at: http://www.securityfocus.com/news/8016
It wasn't really a flaw it was an undocumented upgrade to save the power company subscribers some money.
"at GE our testers sre looking out for you"
But in the end doesn't it all come down to BEER? Beer is the ultimate answer to all questions in the universe so yes the answer to your question is BEER.