CNN CNN Newsroom April 4, 2014 18:37:00
Obviously you don't keep looking once you kind it. it could be only 25 days. but if it's the last thing they find, 124 days. and the ping's dead by then. >> no dice because the battery's going away. but hopefully with those submersibles that could help find the wreckage. but they have to have the debris. keep going back to that. thank you. coming up, a closer look at twa flight 800. these pictures, how they reconstructed the plane. we will tell you how that investigation compares to flight 370. and what does it take for investigators to actually label a crash a criminal investigation? we'll ...