CNN The Lead With Jake Tapper April 21, 2014 20:41:00
The pings, there was an assumption that this could take months and it was taking months in an environment in which we were prepared to take months. so we'll just keep going. >> and one potential phase of a future search, shifting much of it to private contractors and in that search it took more than 75 days over the course of two years to find the wreckage and they even have debris to work off of. this is certainly a difficult situation for investigators. >> pamela brown, thank you so much. let's bring in our best panel of experts. miles o'brien, an ocean search specialist and rob mccallum. ro...