their hearing at 8:30 a.m. eastern time. you'll probably want to be watching ahead of that. we are expecting that robert mueller will give an opening statement to both the judiciary committee and then a different opening statement when he testifies before the intelligence committee in the afternoon. neither of the committees is apparently being given a heads up about those opening statements ahead of time, nor is the justice department and we in the press certainly haven't seen anything in advance. so right off the bat there will be surprises. again, recapping the news we learned this hour, we expect that mueller's dupe, aaron zebley, his chief of staff when he was fbi director and apparently running the day-to-day operations at the special counsel's office, he'll be seated beside mueller during his morning testimony with judiciary, although he won't be sworn in and testifying himself. and then in the afternoon we expect zebley to be sworn in separately and testifying and answering questions essentially as a secondary witness to mueller. it should be a fascinating dynamic.