Has anyone seen this? There’ a documentary out about Curtis Sliwa and the Guardian Angels (martial arts trained group who patrolled the New York subway and London Underground in more dangerous, pre-CCTV times): Vigilante tells the story of Curtis Sliwa and the Guardian Angels | Daily Mail Online
I highly recommend this documentary, and 'Vigilante' is now available on Amazon Prime: Vigilante (starring Curtis Sliwa)