The U.S. Coast Guard confirmed Thursday the missing submersible in the North Atlantic Ocean was destroyed in a "catastrophic implosion." Its debris was found on the ocean floor near the Titanic and all five people aboard were killed. William Brangham discussed the accident and what it could mean going forward with Jules Jaffe of the Scripps Institution of Oceanography. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders