nuclear weapons. reporter: a key intelligence find, satellite images of snow melt on rooftops. about 50 miles north of pyongyang. based on these pick you ares from earlier this year the defense analysts are saying tonight kim jong un s regime has started a second large haul of centrifuges there. experts say those sentcentrifug could be used to enrich uranium for nuclear bombs. kim s building his nuclear arsenal at a dangerous rate. according to weapons experts he may have 10 to 15 bombs right now. kim s also being more aggressive on the ground. tonight, south korea vows retaliation for land mine blasts that wounded two of its
25,000 feet in the air or twiefr,000 metres in the air i should say, yes, 25,000 metres in the air about 82,000 feet roughly double a commercial jet. according to jason defense analysts, both the ukrainian and russian militarys have these weapons in their arsenal. cnn s tom foreman has more on this particular missile system. if you want to figure out what could have hit this plane, you have to think about the circumstances of the plane at the time. it was about 32, 33,000 feet in the air over ukraine. it was about 30 miles away from the russian border. so you cannot hit this with some shoulder-fired anti-aircraft missile. they re just not strong enough. what you would need is something much more like this. this is the buc anti-missile system it s one of those that is being talked about in this case. it is a four-man unit. it has four ready-to-fire
self-propelled missile fired from a launcher on a vehicle like a truck. up to 35,000 meters in the air, around 82,000 feet, if you like. roughly double a commercial jet s maximum cruising altitude. according to defense analysts, both ukrainian and russian military do have these weapons in their arsenal. tom foreman with more on the buk missile system. reporter: if you want to figure out what could have hit this plane, you have to think about the circumstances of the plane at the time. it was about 32,000, 33,000 feet in the air over ukraine. it was about 30 miles away from the russian border. so you cannot hit this with some shoulder-fired antiaircraft missile. they re just not strong enough. what you would need is something much more like this. this is the buk anti-missile system. it s one of those that s being talked about in this case. it is a four-man unit.
so, what s the timeline? people say to me, poppy, this is sophisticated and highly confidential information that governments have, military governments have, about their own capabilities to do with radar, to do with surveillance. they don t want to share it easily. they ve been reluctant to share too much information, which has made it difficult. the malaysians themselves say that they ve been very open about it, but again, defense analysts are saying it s curious that it s taken so long for this information from the malaysians to actually be crunched to a degree where they can actually make these decisions to move the search area. poppy. and to be clear here, we have no satellite images of this new search zone, is that correct? reporter: that s correct. we ve got nothing. all we ve got to go on is the trajectory, a radar image, a lot of analysis of that radar image, which suggests the plane was
that that may not match the reality on the ground. take a listen. so, what we re finding is, they re not giving us the full story about what are the threat streams, who do we need to worry about. are those groups, the terrorist groups who have had some success, are they still plotting? you know, there s a missing gap, and you never want that when you go into something i think as important as the olympic games. i would not go. and i don t think i would send my family. reporter: and defense analysts will tell you that even if the russians are successfully locking down sochi, they cannot lock down the whole country. and the lesson of the bombings here in volgograd is that there remain other vulnerable targets across this country which cannot thoroughly be protected during the olympics, christine. all right, phil black for us this morning in volgograd, russia. thanks, phil. pretty interesting to hear u.s. officials, leaders saying they would not go to russia