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Zero Hour is a Canadian-made, British produced, documentary-style television program, which airs on...

Zero Hour is a Canadian-made, British produced, documentary-style television program, which airs on The History Channel in the United States, History Television in Canada and on the BBC in the United Kingdom. 'Zero Hour' has been shown on Channel Seven in Australia and on Discovery Channel in Africa, Asia, New Zealand and The Netherlands. The program focuses on retelling the details of tragic man-made disasters that unfolded in less than an hour. In some shows some scenes are cut and in others some versions is completely uncut. One example is the Columbine High School massacre-episode which was cut in some scenes on Discovery Channel for showing violence and harsh language. In certain reenactments, newer model vehicles manufactured long after the historical event can be seen being used or make their way into the scene. An example is the reenactment of the North Hollywood shootout where a later model Ford Explorer and a newer Dodge Caravan are used as the SWAT vehicle and a cover vehicle respectively.