What do we really know about Russian 'meddling' in Western democracy?

David Aaronovitch asks experts on Russia what the Kremlin is trying to achieve by hacking emails and spreading fake news.

Guests include the Gordon Corera, the BBC's Security Correspondent, Kimberly Marten, Director of the Program on U.S.-Russia Relations at Columbia University, Andrei Soldatov, a Russian investigative journalist and Anna Nemtsova, Moscow correspondent for The Daily Beast.