Secret Navy system detected sub implosion

After the Coast Guard announced the loss of the missing submersible, questions remain as we learn a top secret U.S. Navy system heard the submersible implode. The doomed submersible was described as an experimental vessel in the OceanGate liability agreement CNN has obtained. So, what was the submersible made of and was that what sealed its fate? To learn more about how CNN protects listener privacy, visit cnn.com/privacy Learn more about your ad choices. Visit podcastchoices.com/adchoices