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Up close and personal with great whites, and blue sharks

When these two guys yell: "Shark in the water!" -- they're happy, not scared. Two researchers tell Mainstreet's Bob Murphy what it's like being close to some of the ocean's deadliest predators.
When these two guys yell: "Shark in the water!" -- they're happy, not scared. Two researchers tell Mainstreet's Bob Murphy what it's like being close to some of the ocean's deadliest predators. 13:50