One of the CIA's deepest and darkest secrets -- a classified report about a plot by the "Ebenezer Scrooge" terrorist group to attack Santa Claus and his reindeer -- has finally been revealed after almost 30 years. Researchers who recently uncovered the report say the joke memo warning about a potential terror attack on the North Pole, which had been classified "secret" for decades, speaks more about the U.S. government's obsession with keeping information from the public than it does of the black humour of the spies who wrote it. The saga of the top-secret Santa file began in 1974,...