CNN Anderson Cooper 360 April 8, 2014 00:24:00
Library that. just nothing in the natural environment that would create anything even similar to that. >> david gallow, let's assume they don't hear any more pings. they just have the pings they got on sunday. randy said these can be heard for two plus miles. to a layman that doesn't seem like a huge amount of area to cover with sonar under the water, with side scanning sonar and underwater vehicles. is that naive to think that? >> no, it's not naive to think that. seems like a small amount. under the sea there's no gps navigation. it's pitch black. fairly hostile environment. where they are w...