North korea says it has an ability to miniaturize Nuclear Weapons able to fit onto missiles. But washington is skeptical. Well get the latest from marie harf. Kim jongun parades once starving citizens who tried to flee showing them off exclusively before cnns cameras in an effort to soften the image of his ruthless regime. Is this the latest propaganda tied to kim flexing his countrys nuclear muscle . Im wolf blitzer. Youre in the situation room. Were following the breaking news the tense confrontation between chineses military and an american spy plane monitoring disturbing developments in disputed waters hundreds of miles off the chinese coast. Thats where beijing is building manmade islands that could serve as launching points for sea battles against the United States and its allies. Were also following the latest isis onslaught with more cities falling to terrorist forces in a bloody offensive that has tens of thousands of people fleeing for their lives right now. And were also learning the u. S. May be getting some vital new information from the wife of an isis commander. Were covering those stories much more this hour with our correspondents around the world and our guests including the state Department Deputy spokeswoman, marie harf. Lets begin with jim sciutto whos in manila right now in the philippines. He has an exclusive report on that confrontation between the Chinese Military and a u. S. Spy plane. Jim, tell our viewers what happened. Reporter wolf it comes down to the fundamental potentially dangerous disagreement. Though these islands are brand new and in fact manufactured china sees them as sovereign. The u. S. Spy plane flew over them today. Chinese protests getting louder. L u. S. Moves getting bolder. The tension there escalating. This is chinese navy. Leave immediately. Reporter high above the South China Sea, the radio crackles with a stern warning. The source of dispute appears on the horizon seemingly out of nowhere, islands manmade by china hundreds of miles from its coastline. Cnn got exclusive access to classified u. S. Surveillance flights over the islands. The first time journalists have been allowed on an Operational Mission by the stateoftheart p88 poseidon, a subhaunting aircraft. Weve just arrived on station now above the Three Islands that are the targets of todays mission. Its these Three Islands that have been the focus of chinas building in the South China Sea over recent years. Chinas alarming creation of entirely New Territory in the South China Sea is one part of a broader military push that some fear is to challenge u. S. Dominance in the region sailing its first aircraft carrier, equipping Nuclear Missiles with warheads and now Building Military bases far from its shores. For the u. S. , the islands are a step too far. This flight is part of a new and bold American Military response that may soon including sailing u. S. Warships close by as well. In just two years, china has expanded these islands by 2,000 acres, the equivalent of 1,500 football fields and counting an engineering marvel in waters as deep as 300 feet. Youre a military man. You look at this. Any doubt thats a future military installation . It appears to be a buildup of military infrastructure not to mention we were just challenged probably 30 minutes ago. And the challenge came from the chinese navy. And im highly confident it came from a shore on this facility here. Reporter what used to be the Fiery Cross Reef now has Early Warning radar, an Airport Tower and a runway long enough to handle every aircraft in the Chinese Military. Some are calling it chinas unsinkable aircraft carrier. These videos of the al qaedas taken from the advanced surveillance cameras, never before declassified. In a sign of just how valuable china views them the new islands are very wellprotected. Theres obviously a lot of surface traffic down there. Chinese warships and chinese coast guard ships. Reporter we heard the proof, the chinese navy ordering the p88 out of the airspace four times on this mission. And like the surveillance videos the audio of these warnings never before shared with the public. You heard over the intercom this is the chinese navy what was interesting is that there are also civilian aircraft there was a delta flight on that same frequency. When it heard that challenge, it piped into the frequency to say, whats going on . The chinese navy then reassuring them but as the flight crew tells me that could be a very nerveracking experience for civilian aircraft in the area. And the more china builds were told the more frequently and aggressively it warns away u. S. Aircraft. This is a dredger actually pumping sand from under the water on top of an area theyre trying to build up land. And we see this every day. So i think they work weekends when theyre doing this. Reporter 24 7 . We see it all the time. Reporter looking at these islands, you see the landing strips you see military barracks roads being built, and squadrons of dredgers and trucks added to them every day. They look like very permanent installations. Its difficult to see out even with increased u. S. Military traffic in the area how china backs down. Jim, why the increased concern about all this right now . I know there is intense concern at the highest levels of the United States government. Reporter its two things wolf. One, it is pace. Over the span of just two years, china has expanded the area of these islands from five acres to 2,000 acres, 400 times, and its rising every day. But it is also this, it is the militarization of them, putting in Landing Craft that can carry the Largest Military aircraft in the chinese arsenal, the Early Warning radar systems, deepwater harbors that can accommodate chinese navy ships. It is that militarization that has the u. S. Considering a bondholder military response. When the Chinese Military says to the american poseidon the crew up there, please go away quickly, whats the reaction from the crew inside that poseidon surveillance plane . Reporter well they recite very calmly a script. They say, we see these as International WatersInternational Airspace and that the u. S. Will continue peacefully. There was one instance there that when that american pilot delivered that message, i heard the frustration from the chinese Radio Operator on the ground coming back simply saying go, go, go away you can hear the anger there. Its hard to see how this tension doesnt escalate going forward. Jim sciutto with an exclusive report for us. Thanks very much. Well get reaction to that coming up. But also theres breaking news about isis that were following vital new information. U. S. Interrogates mayors may be getting information out of the widow of an isis commander. Barbara starr, what are you picking up . Reporter that raid killed him over the weekend. Shes being interrogated. And a u. S. Official tells me now she is talking, she is cooperating, she is engaging with the u. S. Interrogation team. She is offering information. How valuable is the information, is she offering things just to perhaps try and save herself . Theyre going to be vetting all of it, trying to see what they can corroborate. Theyre talking to her about her husbands isis operations money, financing and a very sensitive matter wolf did these two people at any point have any american hostages in their custody . What do they know about the american hostages . Do they know anything about the network that held them how they were held, where they were held . This is one of the top pieces of information the u. S. Would like to get from her. Wolf . We also know isis is taking over the ancient syrian city of palmira right now. And potentially theyll not only slaughter a lot of people but destroy 1,000yearold artifacts, archaeological treasures. How dire is the situation based on what youre hearing . Reporter wolf, a potential historical and cultural disaster in the works. Already the United Nations weighing in this is a World Heritage site of unesco as you say, centuries old. Isis is a short distance away. Syrian forces have had to back off. And obviously isis has done this before gone into these areas of priceless antiquities and destroyed them as part of their rage. A lot of concern about this area and what may happen in the coming hours and days. Of course this comes just as the u. S. Is absorbing what has happened in ramadi and trying to figure out what may happen next. More on this story coming up as well. Barbara, thank you. Now to north koreas frightening nuclear claim. Kim jonguns regime says it now has the ability to miniaturize Nuclear Weapons and place them on missiles capable of striking u. S. Troops, even the u. S. Mainland. Brian todd is working the story for us. Kim jongun tonight is being blatantly aggressive forcing the white house and state department to reassure americans that he doesnt have the capacity to hit the u. S. With Nuclear Warheads. But what worries experts and officials we speak to is that kims regime is working hard toward that goal and may later threaten the american homeland. Brazen about his ambition kim jongun pounds his chest over his nuclear arsenal, north koreas state News Agency Says quote, we have had the capability of miniaturizing Nuclear Warheads for some time. The regime says it can also guarantee the accuracy of short to mid range and longrange rockets. The ominous implication, that kim has the capability to hit the u. S. With a nucleartipped missile. The white house says it doesnt believe nuclear has that capacity but admits they are working on it and could later threaten the u. S. Homeland. Former u. N. Weapons expert David Albright says the reality is in between. Its a credible claim that they could miniaturize. Where their claims are less credible is when they say they can launch missiles with Nuclear Weapons that are accurate. Reporter albright says north korea has flight tested missiles that can hit south korea and japan and has miniaturized warheads to fit those. Theyve also miniaturized warheads to fit missiles that can reach the u. S. He says but those missiles would have to travel through space, then reenter the atmosphere. Albright says north korea hasnt flight tested those missiles yet and they could break up. You may be down 10 , 20 chance of success and are you willing to commit suicide for a 10 chance of success . Most nations would say absolutely not. Reporter but kim and his regime are not most nations. He recently boasted a testfiring of a missile from a submarine. Fortunately theyve not gotten as close as they would have us believe. Theyre many years away from developing this capability. Reporter kim just nixed a planned visit from the u. N. Secretarygeneral and reportedly executed his own foreign minister. One analyst says kim is the most isolated north Korean Leader ever. We know when new units are formed or new recruits brought into the Korean Peoples Army they regularly are lined up to witness an execution. So intimidation is always part of north koreas playbook. Hes really using it. Mike green says it has become very worrisome in terms of how decisions are made inside kims inner circle. Who, for instance, he says will come up to kim and say, dont do that, boss . Glean says chinese president xi jinping cant stand kim. Brian todd, thanks very much. Joining us, the state Department Deputy spokeswoman, marie harf. Thanks very much for coming in. I want to get to jim sciuttos exclusive report. He was in the poseidon surveillance plane. What are the chinese up to from the u. S. Perspective . Why is this becoming such a major source of concern, these manmade islands theyre building hundreds of miles off the chinese coast . It really is the pace and the scope of how theyve really upped their efforts to reclaim some of this land. You saw it firsthand here. I was just in china with my boss secretary kerry, who in every single meeting he has, starting with the president of china all the way down raised this issue because we are concerned it could raise tension with chinas neighbors. Thats our biggest concern, and it could also lead to possible miscommunications. So we think theres a way to resolve this diplomatically. But it is very concerning. How do you resolve this . Theyre using this for military purposes if you believe what these poseidon surveillance planes see, the bases in effect theyre building there . We think they need to stop this kind of land reclamation. We want them to know were watching what theyre doing. We know what theyre doing and its not acceptable. And they can come back from the brink here. They need to take diplomatic steps to discuss some of this with their neighbors, try to reduce tensions in this part of the world. Any indication they are going to do that . The proof is on the ground. Marie, stand by. Much more to talk about including whats going on in north korea, this miniaturization of their Nuclear Warheads isis, lots coming up. Well take a quick break. Much more after this. Virgin islands nice so nice so nice, so nice book five nights to get one free. And 500 toward activities shopping and dining. Thats Virgin Islands nice. So nice, so nice put your hand over your heart. Is it beating . 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Visit the dream machine event today for up to 3,500 towards purchase. Were following news out of north korea, the kim jongun regime claiming it has the ability to miniaturize Nuclear Weapons which could put on missiles capable of potentially striking the United States. Were back with marie harf. Does north korea have this capability based on everything youre hearing . We dont think they do. We dont. You think theyre making this stuff up . I think they say a lot of things publicly to try and make people think they have more capabilities than they do. But we havent seen anything to indicate they do. Ban kimoon, the u. N. Secretarygeneral, was supposed to be in north korea in the coming days but that trip was canceled. Do you know why . Weve seen kim jongun do this with a number of Senior Leaders lately. Hes rejected several meetings. Hes isolating himself even further. At the same time some 30 women, including 30 american women, are now in pyongyang and getting ready in the coming days to do this peace march from north korea to south korea along the Demilitarized Zone saying they have permission from both the north korean government and the south korean government. Did you give them your encouragement to go on this mission when the american women on this trip left . We certainly didnt and we are very clear that we do not believe americans and thats who we give advice to, should travel to north korea. Weve seen as weve talked about americans who are arrested there, who are detained there. We dont think its a place americans should be visiting. Are you worried about their security . Theres also reasons we have these travel warnings in place. Weve seen americans detained. Weve worked hard to get them home. Their hope is that maybe this kind of humantohuman contact could advance the peace process, if you will, and convince the North Koreans to be more reasonable. What could advance the peace price is north korea taking steps to get back to the negotiating table and taking steps to denuclearize like theyve committed to do. We had discussions with the chinese, for example, about how we can additionally pressure the North Koreans to come back in line and stop taking these escalatory moves. Whats your assessment of kim jongun, the north Korean Leader . I think hes trying to publicly make very clear that they have an arsenal that should scare people. I think hes trying to use those kind of scare tactics with this submarine Missile Launch that they can miniaturize Nuclear Weapons. I think hes using a lot of bravado instead of taking care of his own people. Hes showing off on the International Stage and ignoring North Koreans who are starving. Thats what he should be focused on. Lets talk about isis. Theyre making ga