Oh boy, do we ever deal with this. In fact, we avoid exposing DD to news, generally, which I realize is not going to be possible forever.

To some extent, information can help. However, in some cases we find that promisng DD she does not need to worry about X thing is necessary. I don't do this if I can't really promise it, but I have promised that, for instance, our house is not going to be bombed.