Today I learned...
I just finished reading a great book called SPY: the inside story of how the FBI's Robert Hanssen betrayed America.
This is a very revealing book on Robert Hanssen, the FBI agent who spied on the US for the Russians for over 20 years before he was finally captured by his own team.
"Spy" provides a detailed account of Hanssen's upbringing and early marriage, and shows how there were several times he might have been caught, but wasn't - mainly because nobody could see him as a potential spy (he was very staunchly Catholic, was very "old-fashioned", and was strongly conservative).
It also details how he accomplished his spying, and the impact his activities had - from the deaths of a number of Soviet officials who had been turning over information on the USSR.
It's definitely a good rainy day read.