Pulling back the veil of secrecy surrounding McKinsey

In their new book, “When McKinsey Comes to Town,” New York Times investigative reporters Walt Bogdanich and Michael Forsythe dig inside McKinsey & Company, the consulting firm that has worked with corporate and government clients around the world (from entertainment firms to tobacco companies and pharmaceutical manufacturers). They talk with correspondent Erin Moriarty about what makes McKinsey, they say, a major force for spreading ideas globally, both good and bad.