How To Survive If Your Taken as a hostage?

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I have just watched a news and there was a bus full of Korean tourists being taken as a hostage by a former police officer. So, I was thinking, what will I do if I'll be caught up in a hostage taking situation? What if I am among the tourists in that bus? Well, I do love to travel and sometimes I do travel alone and it never crossed my mind that I be in a difficult situation like that. So, I realized, I should prepare myself and gain information on how to survive if being taken as a hostage. Can someone share some idea?