deploy the underwater vehicle as soon as possible. a sample of about two liters has been collected and it will be a number of days before it can be landed ashore and conclusively tested. >> the underwater vehicle will be searching areas so deep that no human has ever seen those areas. houston said, we've got to be realistic about that search. and they are explaining what happened to their loved ones. i want to go now to cnn analyst, les abend who was a 777 pilot.