stoking speculation that he was also cooperating with mueller's inquiry into flynn. to be clear, flynn's lawyers deny any bribe and any deal. the $15 million question was what went down at that 21 club? a venue which has seen its share of intrigue since it began as a speak easy bar in prohibition. the door was always open to the public although a screener kept out some people such as federal agents until pro had i beenation was repealed. as for bob mueller's federal agents, they cannot be screened. does it look like there could be more to this cooperation agreement and how important was this very mysterious 21 club meeting? >> first, it was absolutely important. what you have here is evidence,