Posen Conference

Two years later, in March 2007, Speer's involvement became even clearer in the damning contents of a letter he'd written in 1971 to the widow of a Belgian resistance leader.

In the letter, Speer let slip that he was at the Posen Conference in October 1943 and had heard everything Himmler had to say about the extermination of the Jews.

Speer had lived with this lie for his last 10 years.

The truth had finally been revealed.