Former PM consoled double-agent as he despaired over abandoning family

Archive papers released today show Margaret Thatcher personally intervened to assure a KGB defector that there is "always hope" as he was forced to abandon his family in Russia. Oleg Gordievsky passed on significant secrets to MI6 from the heart of the Soviet Union, but was forced to flee Moscow after his cover was blown in 1985. Sky's Jason Farrell reports.