Flynn to take 5th, decline subpoena...

This seems appropriate, considering the fact that Putin is the world's most notorious gangster and Flynn is his American Capo:

"Former National Security Adviser Michael Flynn will invoke his Fifth Amendment protection against self-incrimination on Monday as he notifies the Senate Intelligence committee that he will not comply with a subpoena seeking documents.

"That's according to a person with direct knowledge of the matter. The person spoke on condition of anonymity to discuss the private interactions between Flynn and the committee.

"The Wall Street Journal also reported that Flynn will decline to cooperate with a Senate subpoena, citing a source close to the matter."

http://www.cnbc.com/2017/05/22/flynn-will-invoke-fifth-amendment-source.html

This is also, just now, being reported by both WaPo and CNN:

https://www.washingtonpost.com/news/politics/wp/2017/05/22/can-michael-flynn-refuse-to-turn-over-documents-to-congress-yes-but-he-risks-jail/?

http://www.cnn.com/2017/05/22/politics/michael-flynn-pleads-fifth/index.html