good evening, tonight on ac 360, it s not just washington now, it s also miami. a second grand jury into mar-a-lago documents probe. what it says about the investigation and trials to come? also the new word on mark meadows, the white house chief of staff of the president on january six has gone before a grand jury. a dam in ukraine is breached at a key point in the war and accusations about who did it. and a retired fbi spy catcher. remember, the spy he caught, the notorious robert hanson, who sold secrets to moscow and more for more than two decades and died in prison. we begin tonight with a previously unknown second grand jury in the documents case. the former trump chief of staff mark meadows has testified before a grand jury, unclear which one. also unclear, when he testified or which line of inquiry the special counsel is pursuing. documents for january 6th or perhaps both. here is kaitlan collins. what have you learned? a lot of questions about this, especially wh
fbi, the information he shared compromise dozens of russian secretly working for the u.s., some of whom were executed. it also gave the russians insight into u.s. eavesdropping, surveillance, and communication techniques. joining me now is cnn chief law enforcement intelligence analyst john miller, former nypd deputy and former fbi operative fbi operative eric o neil. who worked undercover as hansen s assistant to help capture him. he documented the experience in the book gray day, my undercover mission to expose america s first cyber spy. eric, the story is fascinating. you were 25 when the fbi sent you to work undercover as hansen s assistant. what was he like? what was your relationship with him like? and i m wondering what you think on his death? anderson, first, thanks for having me on 360 and john, always good to see you as i said, i was 25. i was an fbi ghost. so catching spies, following