The power at the Bellagio failed for about three days. The failure involved about 1,000 feet of internal primary power cable. Although the Bellagio had emergency and backup power, because it was an internal cable, the backup generators couldn't supply power either. The Las Vegas Sun has one of the best general media coverage I've seen of a technical issue involving power failures. Some data centers and colo facilities would be vulnerable to the same type of problem. Its difficult and expensive to protect against everything in a single location. Geographic diversity is almost always and advantage. http://www.lasvegassun.com/sunbin/stories/gaming/2004/apr/15/516694304.html The power outage that shut down the Bellagio and caused the evacuation of thousands of employees and customers could happen at any resort on the Las Vegas Strip and at any time, Clark County's top building inspector said Wednesday.