Perhaps the most famous assassination in modern times is that of President John F Kennedy. But there are those who claim that the murder of his brother Robert six years later was the next chapter of that chilling story. Although Bobby's assassin Sirhan Sirhan has spent almost 50 years in jail for the crime, Conspiracy reveals a theory which speculates that Sirhan was a pawn of the CIA - brainwashed like the character in 'The Manchurian Candidate'.