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Inside 'escape-proof' Alcatraz Island 'haunted' by Al Capone where punishment was 'The Hole'
prison.The heavily-guarded jail, set on a rocky island just over a mile from San Francisco, was considered “escape proof”. The strong currents in the cold, shark-infested waters of San Francisco Bay made swimming to freedom almost impossible.Only one person is known to have completed the swim – John Paul Scott successfully escaped 1962, after squeezing through cell bars covered in lard.