I think that Mr. Haddam's remarks raise some deeply troubling issues as to what exactly was going on during the period in time in question.

If you have an American citizen who's been shot and killed, I think that that is a deeply disturbing matter, and we would be very concerned about that.

We're going to continue to be deeply engaged and working with the parties.

At this point we have sought some clarification from the Russians as to what exactly their intentions are, what their plans are.

a deeply troubling development.

very serious and deeply troubling.