to interpret that in some cases, so really the best thing is to have eyes looking at it. in deep water, that means using a robot or camera device. in shallow waters, it means using divers. but it's not possible to have them on the bottom long enough to find the things they've been looking at with sonar. >> been very difficult. gentlemen, thanks for your input. stay with us. we'll check in with you later in the show. coming up how the latest discoveries in the java sea are helping us learn about the airasia plane's final minutes. and more on president obama's decision to begin punning north korea for the cyber attack on sony pictures. officials say what happened today is only the beginning.