A catastrophic implosion killed the five passengers onboard the OceanGate submersible headed to the wreck of the titanic. CNN learns a Navy system detected the implosion soon after communications with the vessel were lost - so why did the search go on for four more days? A live report from the Pentagon gives insight. Plus, Christiane Amanpour's exclusive interview with former President Obama in which he reacts to the indictment of Donald Trump, discusses the 2024 race, and comments on Biden’s Presidency so far. And, following Hunter Biden’s plea deal, a whistleblower alleges the IRS recommended far more charges, including felonies, against the president’s son.

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