microscope, and submersible experts have been raising flags about this submersible, and the way it was built, and how it was tested and all of this leading up to that it could end in catastrophe. reporter: this morning, former oceangate ceo stockton rush and the titan submersible facing scrutiny. rush had a reputation as visionary and self-proclaimed rule-breaker. i think it was general macarthur said that you are remembered for the rules that you i have broken the rules with good logic and engineering behind me. reporter: the scientist said that he would have gone on the expedition himself if he had the chance. there is always a chance of catastrophic implosion. it is something that we know about it. it is something that we plan for, and plan against. and it is just a known risk.