CNN Weed 2 Cannabis Madness Dr. Sanjay Gupta Reports March 16, 2014 23:14:00
Are parts of the indian ocean that go deeper than that. are there blind spots in effect in the deep water? >> i can't comment on the blind spots necessarily, but it has been tested successfully to the 20,000 -- to the depth of 20,000 feet. so that's what it's certified to. but as far as the ocean floor, you really can't comment on that necessarily. >> okay. you did mention earlier i want to remind our viewers on land, that ping from the flight data recorders does not go off. it only goes off when it touches water. tom, i want to bring you in here. one of the key revelations over the last 24 ho...
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