CNN The Situation Room April 7, 2014 21:37:00
Either. >> detect it and find it and find a way to bring it up to the surface and then inspect it. brian, thanks very much. let's dig deeper. right now joining us, richard quest and also joining us here, van gurley, along with sonar technology expert arnold carr. let's say that these pings are coming from the so-called black boxes. so walk us through exactly. if the batteries are dead, how long could it take potentially to find them? >> the good news is, wolf, they've got a much smaller area now. up until now we've been talking about tens and hundreds and thousands of square miles. if they a...