Coast Guard investigators say the event was "a preventable tragedy," with OceanGate's failure to follow safety and testing protocols being the main reason the sub imploded.

Multiple contributing factors — including OceanGate’s toxic workplace environment and profit-over-safety ethos — led to the entirely "preventable" implosion of a submersible that killed five people off Newfoundland two years ago, Coast Guard investigators said Tuesday.

The BriefA U.S. Coast Guard report found the OceanGate Titan submersible implosion was preventable, citing design flaws and safety oversights.Stockton Rush, OceanGate CEO, was determined to be responsible for ignoring warnings and regulations,