CNN Chicagoland April 4, 2014 01:38:00
Undertaken. the most difficult search ever undertaken. even though we are constantly refining the search area, even though the search area is move the north, it is still an extraordinarily remote and inaccessible spot. >> but how long will it take? it's a race against the clock as the battery in the black box is expected to run out on sunday. and that could make an already difficult task seemingly impossible. greg stone and robert goyer are here. greg knows just how much we don't know about the ocean. he's an ocean scientist who specializes in undersea technology and exploration. robert is the...
Source: archive.org