if there was a time to pay attention, it is now. starting this week, the impeachment inquiry will step off the private stage and land in the public eye, making a huge and important change in the impeachment process. that brings us to your weekend presidential brief with cnn national security analyst samantha vin grad. sam, so far witness testimony has all been in private. we have seen a number of transcripts released from those closed-door hearings, among them national security council's alexander vindman and fiona hill. what kind of issues did you see in their testimony? >> let's start with the walking, talking, texting security risk currently assigned to brussels. hill goes through in detail the security risks that ambassador