397913 07: A logo glows in front of the new corporate headquarters of the Houston-based energy trading firm Enron November 29, 2001 in Houston, Texas. The energy giant, which at one point handled some one-fifth of all US natural gas and electricity trade, is on the verge of bankruptcy after Dynery Inc. called off its proposed deal to buy Enron on November 28. (Photo by James Nielsen/Getty Images)