nr.philippe.cousteau.dive_00003621
nr.philippe.cousteau.dive_00003621

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    Mariana Trench dive attempted before

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Mariana Trench dive attempted before

The Challenger dive into the Mariana Trench has been attempted before. CNN's Philippe Cousteau explains.

Mariana Trench dive attempted before

The Challenger dive into the Mariana Trench has been attempted before. CNN's Philippe Cousteau explains.