James Cameron Descends 7 Miles Into Mariana Trench

Aired: 3/26/2012 | 0:03:05 | Clip
Shooting footage for a 3-D movie and a National Geographic special, filmmaker James Cameron journeyed to the bottom of the Pacific Ocean on Sunday, seven miles below the surface. Tom Clarke of Independent Television News reports on Cameron's deep dive to the Mariana Trench's Challenge Deep, 300 miles southwest of Guam.

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