An assassination. A News Conference was held to explain what happened. Here it is. Today, two of new yorks finest were shot and killed with no warning. No provocation. They were quite simply assassinated. Targeted for the uniform and for the responsibility they embraced to keep the people of this city safe. At approximately 2 47 today, Police Officers were assigned to a crv in the confines of the precinct, while sitting in a marked car, murdered in the bedfo bedford stieff sants area. They were posted at this department as part of a Crime Reduction policy for the Housing Developments in that area. Officer ramos was in the drivers seat. And officer liu was in the passenger seat. The suspect is Ismaaiyl Brinsley took a shooting stance, fired the weapon several times through the front passenger window, striking both officers in the head. Officer liu and officer ramos never had the opportunity to draw their weapons. They may never actually having seen their assailant. Other officers immediately pursued brinsly southbound. Brinsly then turned westbound on myrtle avenue and fled into the myrtle avenue and willoughby street, the g train subway station. He proceeded down the stairs, onto the westbound subway platform. While on the platform, brinsly shot himself in the head, took his own life. A silver, semiautomatic firearm was recovered near the suspects body. Officers liu and ramos were transported here to woodhull hospital. Despite every effort to save their lives. Both officers tragically succumbed to their injuries. What a horrible senseless loss. Police are looking into social media posts Ismaaiyl Brinsley wrote beforehand. He says my past is stalking me and my present is haunting me. Instagram post said hes putting wings on pigs today. Another said this may be my final post, and it was attached to this picture of a gun. Of course officials have been speaking out about the shooting, condemning it as deplorable violence, which it is. New york city mayor de blasio met with the families and said that the murders tear at the foundation of society. Our city is in mourning. Our hearts are heavy. We lost two good men who devoted their lives to protecting all of us. Officer ramos, officer liu died in the line of duty. Protecting the city they loved. And president obama said this, i ask people to reject violence and words that harm and turn to words that heal. Prayer, patient dialog and sympathy for the friends and family of the fallen. Meantime, members of new yorks Police Department are blasting the citys mayor. Officers turned their backs on him when he arrived at the hospital to pay his respects. One of new yorks former governors, and the police union, also are blasting de blasio. And u. S. Attorney general holder saying they put the officers lives at risk. Theyre referring to holders and de blasios support for Peaceful Protesters after the deaths of two young black men who died in confrontations with officers this year. And another story we continue to follow, more fallout for sony after a devastating cyber attack. Former employees have filed several class action lawsuits over the massive security breach, saying the company should have seen it coming. They cite attacks on the Video Game Division and warnings from north korea. They say employment files and medical information was leaked to the public. Sony did not respond to cnns request for a comment. The u. S. Government says north korea is behind the cyber attack. Messages within the attack had threatened more action if sony released that comedy film weve all heard now, a plot to assassinate north koreas leader. Thats what the film is b the studio has stopped the movies release. Now the u. S. Government wants chinas help in dealing with pyongyangs cyber attack. Will ripley has more on that and joins us live from tokyo. More interesting that china is in the mix of this, will. Reporter yeah, when i visited a cyber lacquer, they had a map around the world where a lot of cyberattacks were originating from. And one of the locations was china. Number two, the United States and number three, brazil. There has long been concern about cyberattacks launching from china and technically when it comes to north korea. China and north korea have perhaps one of the strongest relationships that china has with any country. They trade with north korea. Some it north korNorth Koreans travel into china. Most average North Koreans never heard of the internet, certainly never had free access to it. Simple reason being that north korea wants its people to remain isolated and dont want them though see things on the internet to give them a glimpse outside. The cyber unit to the bureau 121, these technical minds hand picked from Pyongyang University are going to places like china, setting up shop in hotels where theres access to broadband internet, and thats where Law Enforcement officials believe theyre launching these attacks from. So according to one Senior Obama Administration official, the u. S. Has reached out to china and asked for that countrys assistance in investigating this and hopefully putting a stop to it if they can. Isnt it fascinating and so terribly sad that theyre so isolated from the world that their citizens dont know about the internet, but anyway, yes, youve been there. So youve seen that isolation, the creepy isolation. But north korea again, says it wants a joint investigation on this. How likely is that to happen, will . Reporter very unlikely. The u. S. And north korea dont have an official diplomatic relationship. Any country that has ever tried to do a deal with north korea, theyve tried to have a joint investigation over the kidnapping of japanese citizens, every time they think theyve come to an agreement or a promise, theres been a broken promise or missed deadline. So far, their investigations have come up empty after the North Koreans promised to deliver. I remember specifically meeting a young woman in a library in pyongyang, a study house where they have access supposedly to books from all over the world. This young woman was sitting at a computer and asked her if shed ever heard of social media, like facebook. She was 32 years old and shook her head and said no. All they have access to is a strictly controlled internet and websites if you can call them that, that are controlled by the government and only allows them to see what the government wants them to see. Will, thank you as always, will ripley in tokyo. North korea wants that joint investigation with the u. S. As he said, probably not going to happen, but pyongyang is warning of serious consequences if it doesnt get a joint investigation, and if the u. S. Retaliates. For more on that story, we report from seoul. Reporter just hours after president obama lands in hawaii for the christmas holiday, the regime lashes out via its staterun television. All of its usual bluster, the regime slams the u. S. Governments investigation of the sony hack as childish. That north korea is being framed, saying it can prove its innocence without using any torture methods like the american cia, those digs come in response to president obama, that the evidence points to pyongyang. They caused a lot of damage. And we will respond. We will respond proportionally and will respond in a place and time and manner that we choose. Reporter north korea directly rebuked the president , saying it is the one that should respond after insults to its Supreme Leader but adds it will not conduct terror against innocent moviegoers, rather target the originators of the insults. You two are going to be alone in a room with kim. And the cia would love it if you would cake him out. Reporter it got sonys bankroller and ally to respond. China. An editorial calls the movies vicious mocking of kim senseless cultural arrogance and that china was once a punching bag for hollywood, but now as the chinese sit as a gold mine for movies, they go after north korea. They curiously suggest that the two countries Work Together in a mutual investigation to find the real culprits. North korea saying if america refuses, there will be serious consequences. Cnn, seoul. Former heavyweight boxing champ mohammed ali is in the hospital, being treated for pneumonia. His representative says he suffers from parkinsons disease, is in stable condition and has a good prognosis. He made a name for himself, declaring himself the greatest, and that name has stuck. And he always backed it up with his fists and quick wit. And he is a fighter. A short hospital stay is expected. Well, new developments in an australian tragedy. A mother there appeared before a magistrate from her hospital bed. Also, which political system raul castro says will not be going anywhere ask cuba and the u. S. Work toward warmer relations. Has active naturals® oat with five vital nutrients. [ aniston ] because Beautiful Skin goes with everything. Aveeno®. Naturally beautiful results™. Police in australia have now charged a 37 year old mother with eight counts of murder after eight children were found dead in her home. Seven of the victims were her own children. The woman appeared before a magistrate while in her hospital bed. Shed been found stabbed at the scene. Police say they contacted the fathers of all the children. So far, the mother is the one whos been charged. Raul castro confirmed saturday hell attend the summit of the americas in panama in april. It could be the first time he meets with u. S. President obama. The two countries agreed last week to normalize relations. Castro spoke in havana on saturday praising president obama for the policy shift but also saying cuba will remain a communist state. Translator the cuban people would like to say thanks to this fair decision by the u. S. President barack obama. With this, an obstacle has been removed to a better relations with the United States. The whole world has reascted ina positive manner upon the announcement last wednesday. Many cubans hope warmer relations will lead to new business opportunities. Cuban hotels and restaurants could see a surge in customers, but not everyone would welcome the onslaught of american culture. Heres cnns rosa flores in havana with more about that. Reporter Everybody Loves cuba, says this man. An independent contractor renting this cab from the cuban government for about 10 in u. S. Per day. Hes not allowed to drive tourists. Most of his time is spent donating services to the state, which means driving less fortunate cubans for free. On a good day, he takes home about 10 in u. S. Money in profit. He hopes if americans flock to havana, more cabbies like him will be paid to drive tourists to pay to get around. It would be important for that to happen in order for him to make a better living. Hes not the only person here expecting to see the American Dream come into focus. He says americans tend to appreciate finer art at higher prices. Others set to reap the benefits, Construction Companies giving havanas battered buildings muchneeded facelifts while hotels a restaurants take care of extra visitors. Not Everybody Wins if americans start flooding plazas like this one. So whos to lose . Possibly tourists from canada and you know weurope who have b visiting cuba freely already a long time. Maybe the price goes up and more so more service and business come in. We dont want to see too many mcdonalds and starbucks come in. We would like it to be like it is. Reporter its a historic time in havana he says, while there are sure to be winners and losers if the u. S. Embargo is lifted, he hopes the road leads cuba to a better tomorrow. Rosa flores, cnn, havana. Yeah, something about american fast food in cuba just doesnt seem right. Maybe that wont happen. Well, this thawing of relations between the u. S. And cuba may help address certain issues such as bringing americas most wanted fugitives back to the u. S. Jason carroll reports from the u. S. Can learn a lot from people reporter she is somewhat of a cause celeb in cuba, called upon to speak about human rights and equality. She didnt always go by her current name. The fbi most wanted list. Reporter her given name is joanne chessamar. She became the most wanted woman from the u. S. In connection with the shooting of a new jersey trooper in 1973. Reporter back in 1973, she was a member of the black panther party. In 1987, while a fugitive in cuba, she talked about the night she and her companions were stopped while driving on the new jersey turnpike. We ate, got back into the car. And shortly after, we were stopped by the police. Reporter she claims things turned violent almost without warning. He had a gun in my face, and i put my hands out like this. In a matter of seconds, i was shot. Reporter when the shooting had ended, state trooper Werner Forrester were dead, she and another man charged with his murder. What happened out here took place decades ago. But one thing is very clear to troopers. According to the fbi, forester was shot at point blank range with his own gun. A jury found her guilty of murder. She was supposed to serve a life sentence, but three years later, she was broken out of prison. And after hiding out for years, finally surfaced in cuba. She was granted asylum by fidel castro. Since then, they have fought for her extradition. Christine todd whitman had this message. You are holding up the ability of the cuban population to enjoy a better relationship with the United States by your presence in cuba. Reporter now a historic shift in u. S. cuba relations. Could it translate into an extradition agreement, one that would finely force chesimard back to the oust. What they want always is to get into a swap situation, and for u. S. Officials thats a very difficult road to go down. Reporter over four decades since the shooting, troopers here in new jersey are still waiting for justice. Cnn, new york. We have this just in to cnn. Pakistani Security Forces have detained more than 100 people in connection with that massacre that left 148 people dead this past week. The Peshawar Police chief says officials have also recovered guns and ammunition. Security officials are carrying out door to door checks, taking those without peshawar identification into custody. Taliban militants attacked a school tuesday in the city, killing mostly students. Next here, Kurdish Peshmerga forces claim victory against isis militants. And now thousands of people may finally be abe to go home we give you relief from your cold symptoms. You give them the giggles. Tylenol® cold helps relieve your worst cold and flu symptoms. But for everything we do, we know you do so much more. Tylenol®. Kurdish peshmerga fighters claim to control 80 of sinjar. Fighters are going from house to house to check for any booby traps they may have left behind. One journalist said it is unclear right now why isis retreated. The Coalition Air strikes are very, very important. Second, what secondly is important is the moral of the peshmerga. They fight with old weapons. They have kalashnikovs, tanks that are 40 years old, but with the morale is very, very high. Isis invaded their ground. Isis raped their women. Isis beheaded their relatives. So they want to throw isis out of kurdistan. And this is what theyre doing right now. Why did isis flee . To be honest, i dont now. Nobody expected that isis would just leave sinjar. Obviously were very, very surprised about the plan of the peshmerga, about the quickness of the peshmerga breaking the siege of sinjar mountain. So its a mystery why they retreated, but the truth is they did. They say the yazidis can return to their homes, but many homes are in rubble because of the fighting. Well, the u. S. Has released four more detainees from guantanamo center. They were sent back to afghanistan. That leaves 132 still at guantanamo. President obama has been working, as you know, to shut down the prison which has been housing terror suspects after 9 11. The four freed men were suspected of belonging to the taliban or similar groups. Were going to turn to the weather now. Your chances for a White Christmas not looking too whiteout there. Depends on where our viewers are. Were changing seasons at the moment, taking place on december 21 at 6 03. Officially the northern hemisphere, we turn into the winter solstice, even though weve had plenty of snow and coal there. The Southern Hemisphere officially becomes summer. And thats also the longest day of daylight hours. So beautiful time of the year to be in places like cape town, south africa. You can see new england into maine, vermont, new hampshire, into minnesota and michigan rockies, sierras are all seeing snowpack. So the likelihood of a White Christmas is pretty good for those locations. But with temperatures above freezing for much of the United States, well see some of that melt rather quickly. Now this is the christmas forecast. The east coast of the United States where were monitoring a storm system thats going to bring us the possibility of rain. It will be on the warm side of this storm for much of the major metropolitans. And so thats going to impact quite heavily on travel conditions across this region. Hopefully we can bring up some of this footage where santa made a pretty interesting visit. This would be under water, that s is. In the florida keys. Hes actually delivering presents to all the good mermaids and ferb under the sea. This is actually a good tradition for the region, because the, theres actually an opportunity for fundraising for people who actually take photos with the wet santa claus after he gets out of the water. Santa is just so versatile and multi talented. Amazing how he can be in so many places at once. Absolutely. Thanks, derek. Well, the comedy about the assassination of north koreas leader wont be available in theaters. But dvd copies may