Steve Kroft investigates the multibillion dollar industry that collects, analyzes and sells the personal information of millions of Americans with virtually no oversight.

Over the past six months or so, a huge amount of attention has been paid to government snooping, and the bulk collection and storage of vast amounts of raw data in the name of national security. What most of you don’t know, or are just beginning to realize, is that a much greater and more immediate threat to your privacy is coming from thousands of companies you’ve probably never heard of, in the name of commerce.