we've spoken on length at this part of the investigation but can you give us a sense of how the underwater investigation will be progressing in terms of searching for the flight data recorders and the cockpit voice recorders and what are some of the major obstacles the search teams will be undergoing at the moment? >> first of all, thank you for having me here. first and foremost is the weather. we've had weather the past several of days and that's something they can't fight against. they have to wait it out before deploying anything into the water. i believe the french teams are now on site. they're using a hydrophone. it's really just underwater ears, if you will, to try and pick up sound and what i imagine they're doing at this point, and they're being very low key about it is working within the grid pattern, the search pattern they have. again, this is an area they're telling us the size of delaware 2,000 square miles. that's a lot to cover. but they have to do this methodically. first and foremost is waiting for the weather to have a clearing putting the