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>> right now it is very cold, but it is very tense as well. we spent most of the day with an armored unit of ukrainian army. the russian boarder is that way, only about five miles away. in the course of the day, despite the news we heard that maybe russia is moving some of the troops back, the ukrainian government thinks they are repositioning and bringing more to the northeast border here. what the ukrainian military has been doing is bringing vehicles like this into the area with a back hoe digging out an area and digging in these vehicles. this is an armored vehicle. it's got a cannon on th...

>> it is. and i think perhaps the read at 45,000 may be inaccurate. but the amount of altitude loss from 45 to 23 and the amount of altitude loss from the thais, 35 to 12, that's the same amount of altitude. and four raiders radars, two countries, the airplane descended in my view. >> what happens to the passengers -- a lot of passengers -- if the plane is going at -- let's say it went to 45 and down to 12, what happens to the passengers? >> i don't think you can get to 45. >> can a 777 reach 45,000? >> theoretically, but not loaded the way it was going to beijing, not going to make it. at 35 ...

>> that's what happened back in 2010. north korea fired at a south korean war ship and actually hit and killed south korean sailors and then fired at a town in a disputed area along the border. the tensions were sky-high at this time. let's not forget, victor. you know this well. that they're, what, almost a million north korean troops north of the dmz, the demilitarized zone. nearly a million troops, 30,000 american soldiers along the dmz. one miscalculation and that place could explode. >> i think that's exactly right, wolf. you put your finger on it. these things may seem like small things,...