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Alexandra Cousteau: U.S. Needs a National Water Policy

Alexandra Cousteau spent four months traveling North America to document severe cases of polluted rivers and neglected bodies of water. She told CBS News chief Washington correspondent Bob Schieffer on Friday's "Washington Unplugged" that "Expedition Blue Planet" is only the beginning of her efforts.

Her tour racked up more than 17,000 miles and highlighted critical issues some Americans may not know exist.

"We saw the Colorado River die in the Mexican desert. It hasn't reached the sea in over 12 years, which has caused real hardships for the communities both farmers and fisherman who depend on the river reaching the sea," Cousteau said.

To protect our rivers and streams, Cousteau says the United States needs a national water policy.

That's a goal she is working on through her Washington, D.C.-based nonprofit organization, Blue Legacy.

This is not the first time Cousteau's bus has endured long-distance trips. It was Sen. John McCain's (R-Ariz.) campaign bus during the 2008 presidential election and later belonged to rocker Sir Paul McCartney.

Watch Friday's full show above which includes the full interview with Cousteau, a report on Congress from CBS News correspondent Nancy Cordes and an interview with actor Kevin Spacey on his new movie "Casino Jack" about disgraced lobbyist Jack Abramoff.

"Washington Unplugged,"'s exclusive daily politics Webshow, appears live on each weekday at 12:30 p.m. ET. Click here to check out previous episodes.

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