GRID ATTACKS OR HUMAN FAULT OUTAGE

Brazilian Blackout Traced to Sooty Insulators, Not Hackers
http://www.wired.com/threatlevel/2009/11/brazil_blackout/

Errata Security: Power Outage NOT Caused by Hackers
http://erratasec.blogspot.com/2009/11/brazil-outage-not-caused-by-hackers.html
• Report: Cyber Attacks Caused Power Outages in Brazil
• No Chinese Hackers Found in Florida Outage Either
• Did Hackers Cause the 2003 Northeast Blackout? Umm, No
• Put NSA in Charge of Cyber Security, Or the Power Grid Gets It