CNN 05/20/2015 05:01:30 PM: ...tied to kim flexing his country's nuclear muscle? i'm wolf blitzer. you're in "the situation room." >>> we're following the breaking news, the tense confrontation between chinese's military and an american spy plane monitoring disturbing developments in disputed waters hundreds of miles off the chinese coast. that's where beijing is building manmade islands that could serve as launching points for sea battles against the united states and its allies. we're 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 we're also learning the u.s. may be getting some vital new information from the wife of an isis commander. we're covering those stories much more this hour with our correspondents around the world and our guests, including the state department deputy spokeswoman, marie harf. let's begin with jim sciutto who's 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 state-of-the-art p-88 poseidon, a sub-haunting aircraft. we've just arrived on station now above the three islands that are the targets of today's mission. it's these three islands that have been the focus of china's building in the south china sea over recent years. china's 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. you're ailitary man. you look at this. any doubt that's a future military installation? >> it appears to be a build-up of military infrastructure, not to mention we were just challenged probably 30 minutes ago. and the challenge came from the chinese navy. and i'm 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 china's 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 well-protected. >> there's 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 p-88 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, what's going on? the chinese navy then reassuring them but as the flight crew tells me, thauld be a very nerve-racking experience for civilian aircraft in the area. and the more china builds, we're 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 they're trying to build up land. and we see this every day. so i think they work weekends when they're 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. it's 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: it's 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 it's 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, what's 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 waters, international 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. it's hard to see how this tension doesn't escalate going forward. >> jim sciutto with an exclusive report for us. thanks very much. we'll get reaction to that coming up. >>> but also, there's breaking news about isis that we're following vital new information. ...
答：经向中方有关部门了解，20日，美军一架P-8A反潜侦察机抵近中方南沙有关岛礁海域进行侦察活动。中方守礁部队依照规定对其进行无线电喊 话驱离。需要指出的是，美军机抵近侦察的举动，对中方岛礁的安全构成潜在威胁，极易引发误判，进而导致海空意外事件，是十分不负责任，也是十分危险的，有 损地区和平稳定。中方对此表示强烈不满。我们要求美方严格遵守国际法和相关国际规则，不要采取任何冒险和挑衅行动。中方将继续严密监视有关海空情况，并视 情采取适当和必要措施，防止发生危害中国岛礁安全的情况和海空意外事件。