let s share what he s seeing. reporter: here in sr. ukraine ukrainian troops are digging new trenches. it is slow, incredibly back-breaking work. they have to chip right into the frozen ground and these trenches go on for miles. the reason that they are preparing for the worst now is that they worry that negotiations between the united states and russia could either fail or that russia is not negotiating in good faith. that russia is just going through the motions of diplomacy so that it can claim that it gave peace a chance and then inn said this country again anyway. admiral, you were in charge of nato. the united states and europe s relationship has gotten a lot more strained over the last few years. how critical is it for all of us to be on the same page now? it s essential, steph. here is the good news, i think we are. as i look at the way the administration has worked very hard to rebuild those