Best research on "who is who" and how they benefitted
Anyone who thinks that hundreds, even thousands, of people can't keep a secret is an idiot.
Ever heard of "The Manhattan Project?" Thousands of people kept it secret that the US was developing a nuclear bomb during World War II.
Millions of people are involved in a global industry that's as big as the consumer electronics business - the illegal drug business - and expect for arrests of users and very low level street dealers, the industry operates in secret.
Bankers, manufacturers, transportation experts are all involved and they apparently keep what they're doing so secret that thousands of tons of drugs find their way across the ocean and into the bloodstreams of millions of users every day.