quote, maintain peace. i want to bring in chief global affairs correspondent martha raddatz, who has been reporting and anchoring from the region on the ground with the u.s. defense secretary. and martha, you said your sources have been telling you all along that they believe -- you don't amass 150,000 troops on the border if you're not going to do something. putin has given that message tonight to assist in peacekeeping efforts. and we should also point out this evening and i'm curious what you make of this, martha, in the separatists regions, they actually claim more territory than they control at this point. is there a risk that the russians could expand those boundary lines? >> reporter: i think the risk is very real, david, at this hour. the pentagon's watching this closely, the white house is watching this closely. those russian troops on three sides of ukraine are all in atack positions. they are refueled, their weapons are uploaded. they have dispersed, so, they're keeping their eye on that. they may move in further slowly, but the real concern, as cecilia