What is the structure of the crime organization known as the Cosa Nostra? What does Cosa Nostra mean? Who designed the hierarchal structure of the Cosa Nostra?

Why did Vito Genovese put a hit on Joseph Valachi while both were serving time in the Atlanta Federal Penitentiary? Was Genovese correct about his suspicions?

What did the FBI call the Cosa Nostra? Where had Federal authorities heard the phrase "Cosa Nostra" before and what meaning did it have to them?

Who was the US Attorney General who directed the FBI to prosecute organized crime? Prior to this AG's orders, what was the focus of the FBI's attention?

What did Joseph Valachi's revelations about the Cosa Nostra do to the organization? Prior to Valachi's revelations about the Cosa Nostra, why was that crime organization able to operate so effectively?

Why did Italian men seem to have...