Last year, five people hoping to view the Titanic wreckage died when their submersible imploded in the Atlantic Ocean. This week, a Coast Guard panel that's investigating the Titan disaster listened to four days of testimony that has raised serious questions about whether warning signs were ignored.

A paying passenger described an aborted dive due to a mechanical failure, while OceanGate employees described a cutlure that prized profits over safety.

The Titan submersible had to abort a dive just days before the implosion that killed its five passengers as they explored the wreck of the Titanic, an ex-employee of the company that operated the vessel testified on Thursday.

After a 24-hour break, the Coast Guard’s hearing into why a submersible set to explore the Titanic imploded has resumed Thursday. Witnesses scheduled to testify include Renata Rojas, a former passenger,