Education | Extreme Measures
Clip: Season 29 Episode 12 | 5m 2s
A look at extreme measures to protect salmon from predators, as well as efforts to count salmon populations.
Aired: 09/21/11
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Problems Playing Video? | Closed Captioning
Clip: Season 29 Episode 12 | 5m 2s
A look at extreme measures to protect salmon from predators, as well as efforts to count salmon populations.
Aired: 09/21/11
Problems Playing Video? | Closed Captioning
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