the idea of the safe guards are in place, corroboration. you want to have other objective information available to you to say this is actually what happened. >> and it happens all the time. >> i was going to say didn't rudy giuliani make his name by flipping members of the mob? >> long ago i was a summer intern in rudy giuliani's u.s. attorney's office. i worked on the commission case which was the case that brought down the heads of the five families. it is one of rudy giuliani's greatest triumphs. it was built on the testimony of cooperators. every case against mob leaders, against the top insider traders are all based on people who plead guilty and flip. if you want to stop that you stop prosecuting the leading criminals in america. >> just because you are flipping does not mean it is not factual information. it should be truthful.