CNN Early Start With John Berman and Christine Romans April 15, 2014 09:31:00
On its first trip scanning the ocean floor, nothing of interest, nothing related to the plane, and it was a trip cut short because this unmanned sub had descended to the maximum depth it could, some 15,000 feet below the ocean surface. now, the bluefin-21 is called the best hope yet for finding wreckage from this jet, and this morning, search crews preparing to lower it again, again into the indian ocean to look once more for the plane that's been missing now for 39 days. erin mclaughlin live in perth with the latest on the search. so, they got it out there, they got it down for a couple of ho...