[Nathan clasps his hands behind his back.]

The most pressing matter first:

I'm sure you're all well aware of the arrival of the Brotherhood of Steel. You'd have to be blind and deaf to have missed it. What you don't know is that they have personnel files from Adams. They knew who I was. They recognized me from their files. You should all operate under the assumption that they may have a file on you as well. Your covers may be worthless if a Brotherhood patrol gets a look at your face. The lives you've built here may be taken away from you.