PBS Newshour on James Cameron’s trip to the Mariana Trench

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. “He set off in the middle of the night, but it makes no difference when you’re heading to the darkest place on Earth.”