There's a great deal of interest in the whistleblowers who have revealed details of American military and intelligence operations.
Bradley Manning is due to be sentenced after being convicted of 20 criminal counts for handing over secret U.S. documents to WikiLeaks.
WikiLeaks founder Julian Assange remains in Ecuador's embassy in London, and from Russia, Edward Snowden continues to embarrass the U.S. National Security Agency.
That fascination has also gripped the film world, as the BBC’s Tom Brook reports.
This segment aired on August 20, 2013.