AdvertisementAll 5 passengers aboard Titan sub are dead after a 'catastrophic implosion'Updated June 22, 2023Emily OlsonVanessa RomofacebookEmailRear Adm. John Mauger, the U.S. Coast Guard District commander, speaks during a news conference in Boston on Thursday about the search for the missing OceanGate submersible Titan. (Reuters)This article was originally published on June 22, 2023.