Best read of the weekend so far? The New York Times has a great article on one of the FBI’s vindictive letters to MLK, designed to intimidate and demoralise him. On the one hand, the letter encouraging King to kill himself and detailing his extramarital affairs is a fascinating window into a period of history. And on the other hand, it resonates into the present day, as debates rage about privacy and the NSA and other security services eavesdropping on citizens in the name of security. Do we trust these agencies not to use personal information to pursue vendettas against people or public figures? At what price security – and freedom?