criticism and political power surround slat mere putin. new questions surround the strong mans actions around his political opponts, some of whom have been assassinated. joining me is the author. we'll get right to it as i know your book focuses on the former russian spy who died in '06 after drinking some tea that was laced with a radioactive poison. what did you uncover that made a connection to mr. putin? >> well, it is not just people like me writing this kind of stuff. we had a public inquiry in london last year, and it concluded that vladimir putin had probably approved the assassination with a radioactive cup of tea. he is someone, according to a british court, who murders people he doesn't actually like. >> i know that your reporting