They have many many minor technical errors with regards to the facts about guns, bullets, and the shootout itself. They also try very hard to make it more of a drama than a solid documentary. I guess they assume the average TV viewer is more interested in action and drama than the facts. Which is probably true but also makes for a bad documentary. I recommend you watch it as a primer for the shootout then go find better sources of information. Even Wikipedia does a better job at informing its audience.
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