Charlie Chaplin-a Communist?

Charlie Chaplin has hit the news today, years after his death due to the release of MI5 and FBI documents. It turns out that during the 'red scare' in the US in the 1950s Chaplin was investigated by the FBI to see if he had ever been a member of a communist party. The result was that he hadn't but did have left wing sympathies. What baffled the FBI and MI5 at the time, however, was not Chaplin's politics but his mysterious birth. Neither agency could find a birth certificate for Chaplin! Very bizarre. For more on this see the BBC website http://www.bbc.co.uk/news/uk-17072165