The U.S. Coast Guard released additional footage of the wreckage of the Titan submersible, which imploded on its way to the Titanic, killing all five people on board.

Another mission specialist who worked with the company that owned the Titan submersible that imploded last year while on its way to the Titanic wreckage is testifying before a U.S. Coast Guard investigatory panel Friday.

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.

The scientific director of the company that owned the Titan submersible testified about a malfunction prior to its fatal dive to the Titanic wreckage. The incident caused passengers to tumble and raised questions about the company's operations.

The scientific director of the Titan testified Thursday that the sub malfunctioned days before the failed mission that ended in an implosion, claiming the lives of the crew and prompting an international rescue effort.