interviews. democrats have point out it irregulator lar to release the enter sues. it s not uncommon to have disagreements between enforcement agencies about which charges should be brought and which cases should be brought. it s difficult to prove the sort of felony tax charges against hunter biden. what you have to show that people knew what they were legally obligated to do that they didn t. so i want to see more about. but it s not terribly uncommon to played out as misdemeanors. the one thing you definitely know house republicans still looking into it. josh, melissa, thank you. back out to anderson cooper right now. reporter: phil, new insight into what could have gone wrong with the titan submersible that led to a catastrophic implosion. plus, we will speak to someone