military. so right now we re seeing reports of soldiers going off for the planting season. reporter: he says other soldiers are needed to work in mining and manufacturing, some of the largest state trading companies are allied with the north korean military, the longer they stayed away, the less money they made. earlier this month, the north said it might return to talks on its nuclear program if the u.s. and south korea would end their military exercises, lift u.n. sanctions, and stop criticizing king jo kim jong-un. kerry says if the north continues to threaten, the u.s. has to continue maintaining a major military presence in the region, that s something beijing doesn t want. jill dougherty, cnn, the state department. when we come back, a horrifying building collapse
and the biggest pool of organized pool of labor in north korea is the military. so right now we re seeing reports of soldiers who are going off for the planting season. reporter: park says other soldiers are needed to work in mining and manufacturing. some of the largest state trading companies are allied with the north korean military. the longer they stayed away, the less money they made. earlier this month, the north said it might return to talks on its nuclear program if the u.s. and south korea would end their military exercises. lift u.n. sanctions, and stop criticizing kim jong-un. and kerry wants china to do more, obviously, and is using american leverage. he s telling beijing that if the north continues to threaten, then the u.s. would have to continue with a major military presence in the region, in asia, and that s china doesn t want. wolf? i had been told, jill, that the u.s./south korean military
the last legs of the kim jong il regime. north korea is run by leaders that run their own state trading companies. this is an important source of revenue for operating budget as a country that doesn t have a national budget like most countries do. using the webs of analysis falls short in north korea. but if we follow these trading companies and link them back to these powerful individuals inside north korea, it provides a new lens, and i think we can start piecing things together. but it is a newfield altogether in terms of research and study. dr. park, we appreciate your availability to give us the context that you did and the analysis. thank you, sir. my pleasure. john park, north korean specialist at harvard. coming up, the government agency making headlines for all the wrong reasons and that s not easy to do. what the gsa really stands for. plus, the real drama behind the prime time saga scandal. washington s top fixer joins us
falls, what happens to that cash? we re also seeing some new video of a violent train crash. time to play reporter roulette. miguel marquez, straight to you in yuma, arizona. you were briefed. have you even more information on what s happened there. the two helicopters colliding in the skies over yuma. snfrl yeah, we just spoke to the base commander. the most stunning thing coming out is the picture of that crash. it occurred around 10:30 p.m. eastern standard time on the california side of the base here. the entire crash was there. if you look at those pictures, what is very, very clear is it was in fact, a mid-air collision. there may have been an explosion as well because there s not much left of either of those helicopters except for a rotor that you can make out. the terrain says the base commander is very much like afghanistan and in iraq. the only differencing between that it s not the altitude isn t quite as great. commander also told us that there was a training pi
i m wolf blitzer. you re in the situation room. what s the latest on the fight between the front-runners. reporter: wolf, it s pretty clear last night s debate touched off a very personal tone in the race for the gop nomination. that s because there s a lot riding on the next several days. i hope you watched the debate last night. it was kind of fun. reporter: the morning after the debate, mitt romney had a smile on his face, swinging away at rick santorum. i don t know that i ve ever seen a politics explain why he voted against his you re entitled to your opinions, but not entitled to misrepresenting the facts. i took that at aim. romney took aim at his performance. when le tried to justify his vote for the no child left behind law sometimes you take one for the team for the leader, and i made a mistake. politics is a team sport, folks. in front of a big crow, romney knocked that one into the blea bleachers. i wonder what team he was taking it for