DID McKINSEY BLOW IT? - The world's most prestigious consulting firm helped create Enron's high-risk business model. Some of McKinsey's other clients haven't fared so well, either: Kmart, Swissair, and Global Crossing. And those are just the biggest. Now, the meltdown of so many clients is raising some uncomfortable questions. Did McKinsey's partners, caught up in the euphoria of the late '90s, ...