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controls and sensitive information without adequate oversight. zatko also alleges some of the company's senior most executives tried to cover up twitter's vulnerabilities. cnn's donie o'sullivan is here with the exclusive details. what are we seeing, what are the main headlines out of this disclosure? >> that's right, kaitlan, a lot to break down in this. this disclosure is in the hands of multiple u.s. law enforcement agencies, including the s.e.c. and the department of justice and today zatko is speaking out for the first time to cnn. have a look. ready? >> yes. >> why are you comi...

There are national security and business implications, so joining us now, cnn chief business correspondent christine romans and author of the only plane in the sky garrett graf. you're written extensively about national security. i want to start with the national security implication here. when a whistle-blower says twitter is a threat to national security and democracy, that sounds alarming. why exactly, what do you see in this that is of such concern? >> i think there are two things that stand out to me. one is just the sheer credibility of the whistle-blower. peiter zatko, that's the name h...