National Geographic Society

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Rumble in the USA

Two young grizzly bears fighting in a salmon stream. Rarely do real vicious fights break out, but when they, these well-armed opponents can do some serious damage to one another.

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In America's wild West, predator and prey go head to head in epic battles of survival -- but what happens when animals turn on their own kind to win food, territory and rights to the bloodline? Footage of America's most iconic animals fighting it out is captured in stunning HD and slowed down to reveal every gut-wrenching and flinch-inducing moment.