♪ we are learning more about the gunman, his social media pages threatening officers and his lengthy criminal past. >> and new york city police officers showing their anger, turning their backs on mayor bill de blasio over previous comments about the death of eric garner. this is cnn breaking news. >> we're getting first look at two new york city police officers ambushed insued their patrol car.

>> the gunman sent a warning saying he was going to kill police in retaliation for the deaths of eric garner and michael brown. >> good morning. >> i'm victor blackwell. 6:00 on the east coast. here's the latest on what we know. the gunman who killed new york city police officers in cold blood. he is now dead. >> the investigation into why he did what he did, that is just beginning. it's focusing on threats that remain online. police say suspect shot himself at a subway station after cops chased him there. >> minutes earlier, he ambushed police officers wenjin liu and rafael ramos as they sat in their squad car in brooklyn yesterday shooting both men in the head. >> brinsley came to new york and he made threatening comments about the officers. well that warning came right when the ambush happened. that is according to new york police commissioner william

bratton. now visibly shaken, he laid out the chilling details of the moments when the officers were gunned down. >> they are two of new york's finest. they were shot and killed. no warning. no provication. they were quite simply assassinated. targeted for their uniform and for the responsibility they embraced to keep the people of this city safe. approximately 2:47 p.m. today, police officers wenjin liu and rafael ramos were assigned to a critical response vehicle, crvs as we refer to them, in the confines of the 79 precinct. while sitting in a marked nypd police car in full uniform, both were ambushed and murdered in front of 98 tarp inz avenue in

brooklyn, new york city. both officers were assigned to the 84 precinct but were posted at this location as part of the department crime reduction strategy to address complaints of violence in the area of the housing developments in that area. officer ramos was in the driver seat and officer liu was in the front passenger set bee side him. according to witness statements, the suspect was identified as 28-year-old ismaaiyl brinsley walked up to the car. he took a shooting stance on the passenger side and fired his 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 have actually even seen their assailant.

>> new york mayor bill diblasio was emotional. he praised the officerses, wenjin liu who got mayor wid two months ago and 40-year-old raph raph raphael ramos. >> although we're still learning the details, it's clear this was an assassination. these officers were shot exhaustion style particularly despicable act which goes at the very heart of our society and our democracy when a police officer is murdered. it tears at the foundation of our society. >> now before the mayor spoke, new york city police officers showed their anger by turning their backs on the mayor over previous comments about the death of eric garner. we're going to have much more on that part of the story. >> this new york shooting

suspect certainly had a record. he had earlier shot and seriously wounded a woman believed to have been his ex-girlfriend in baltimore. he had been arrested several times in georgia where he had a home. those charges included shoplifting and property damage, obstructing a police officer. brinsley suggested on social media he planned to kill police officers. we have more. lori, good morning. >> hey there. as we piece together this tragedy, we're also piecing together the digital footprint of the shooter behind this or ifk event. he had an extensive social media profile. i want to give you a little sample of that. the last post the shooter posted on facebook, let me read this to you. he said i always wanted to be known for doing something right but my past is stalking me. my present is haunting me. i now before that he said if you don't love to live. he also said when we heard from the nypd and heard from commissioner bratton, he spoke

quite a bit about the digital clues and instagram and how the shooter posted on instagrandmother and piece together the motivation behind this tragedy. i want to get to one of the suspicious posts allegedly posted by the shooter. he said i'm putting leans on picks today. they take one of ours, let's take two of theirs. he also goes on to say this may be my final post with a picture of a gun. and a bullet. so you really begin to wrap your head around the clues and the motivation behind this horrific attack. back to you. >> all right. getting answer there's. lori seeingal, thank you. >> twinlt bring in our cnn law enforcement officer to talk about this. tom, you know, we see the police, they're just starting their investigation and looking into motive. certainly when you take a look at the social media posts, particularly on instagram, it gives you a good sense that he was hinting this was in retaliation for the deaths of michael brown and eric garner. when you see those posts, does that look like that is the, you

know, the right direction here or was that possibly an excuse he was using? >> good morning. no, it looks like take it at face value. he posted that out, the intention. but not just that but the disrespect of police, calling them pigs. i was a street cop for six years before i became an fbi agent in the '70s and we were pigs. people on the street, white and black, a lot of disrespect for law enforcement. it was at the height of the protest of the vietnam war. and that was common. we haven't seen that for decades. and now we're seeing a return to this level of, you know, people calling the police names, people in the new york protests walking down the street in the last week or so, calling for the death of pigs, death of police. you know, this reached a strong point of rhetoric where people on the borderline like this guy probably meantally deranged, absolutely has a criminal record.

he shoots his girlfriend who has nothing to do with the police. so, you know, obviously, he's deranged already. but does the public discourse put him over the edge and give him an excuse to go ahead and go out and at least in his terms killing police officers? >> tom, one thing we noticed, too, he made the posts on instagram and then the baltimore police sent this warning to new york police saying, look this guy is dangerous. he might want to do something. unfortunately, that was too late. what i was reading is that was a warning that was faxed to the new york police. when you're dealing in an age of instagram and tweets, when you have the facts, the facts arrive at the time almost at the time of the murders much too late. what kind of tools need to be used, communication tools to warn the police in new york? i mean beside the facts? is there something that could have been done faster? >> i'm not sure that was the exact thing or somebody just used the term facts. it could have been the normal communication, the tell he type network that collects all police departments in the country with

the federal agencies like the fbi and marshals and atf. so it could have been that way. someone just used the term fax. that is the first point. the second and more important is even if the police had received this warning, say two, three hours earlier in the day before the shooting happened, we don't know how specific it was. did it name him? did it give an address he's going to? did it give him a car with license plate information where they could veb specific in who they stop and talk to? can you imagine the police in that neighborhood if they start doing stop and frisk on every young african male walking around who might be carrying a gun and, of course, it's winter time. you have coats on you don't know what is under the coat. it could be a shotgun or pistol. can you imagine the outcry if nypd was doing stop and fris thak afternoon after getting that message? >> sure. i want you to take a listen to what the mayor said about how this unfolded in social media.

>> there is something important here. this individual, this horrible assassin put information on the internet. it was a very, very brief time line. there may be other people posting things like this. we should focus on is if anybody knows of anybody who puts information like that on the internet or says it to someone, it has to be reported by the way to so we can protect our officers, protect our entire civilization. >> so, tom, the mayor is asking for people to, if they see something, say something. if it's on the internet if, they hear it. is it possible that people, the community itself can go ahead and be a part of policing the -- be a part of looking for the warnings and clues in enough time to actually go ahead and have that message delivered on the ground so something like this wouldn't happen. >> it's possible, especially as i said, if it's specific enough

information about an individual and where that person might be and what kind of vehicle he's driving and that type of thing. but if you just put a general be on the lookout, this is many of people protesting in the last couple months have said oh, the police stop me. i was doing nothing but, you know, walking down the street. and they said you look like somebody we're looking for who has just committed a crime. that is exactly what you would have here. you would be asking the police, you know, stop everybody walking around who is a young african male because they might be out to kill you. and this is a little bit tricky here for the police unless they have specific information about a specific person with an address with more descriptive data. >> all right. tom, please stay with us. we'll have a lot more on this. we'll have a lot more to discuss in the new york shooting, why the police also are furious with the mayor of new york city. >> president obama, he also issued a statement on the officers' killings. he said i have it here.

he said i uncon decisionally condemn today's murder two of police officers in new york city. two brave men won't be going home to loved ones tonight and for that there is no justification. the officers who serve and protect our communities risk their own safety for ours every single day and they deserve our respect and gratitude every sing day. tonight i ask people to reject violence and words of harm and turn to words that heal, prayer, patient dialogue, and sympathy for the friends and family of the fallen. we're continuing to follow this breaking story with new developments of the two new york city police departments shot and killed. >> and also how the community is reacting to the gunman's possible motive.

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brinsley. the murder of two new york city police officers come at a time of strained relations between city hall and one police plaza. >> last night while visiting the hospital where the two officers were pronounced dead, mayor bill diblasio is met with a sign to the mayor as he walked by. >> the head of the police union echoed fury reporting that city hall and the mayor had blood on their hands following the death of officers wenjin liu and ralphael ramos. >> there's blood on many hands tonight. those that insighted violence on this street under the guise of protest that tried to tear down what new york city police officers did every day. we try to warn. it must not go on.

it cannot be tolerated. that blood on the hands stops on the steps of city hall in the officer of the mayor. >> the tension between new york city's police force and mayor started a couple weeks ago after diblasio said that he warned his son who is biracial about racism and the police. let's talk about this with cnn law enforcement analyst tom fuentes. insighted violence and starts on the steps of city hall. let's start with the comments made by mayor diblasio after the grand jury failed to indict the officer in the death of eric garner. >> we've had to talk to dante for years about the dangers he may face. good young man, law abiding young man that would never think to do anything wrong and yet because of the history of still hangs over us, the dangers he may face, we've had to literally

train as families have all over this city for decades in how to take special care in in encounter he has with the police officers that are there to protect him. >> tom, we've had this conversation on this network in detail over the past several months that this is a conversation that many families, i would go as far to say most families raising young black males have with them. but is it appropriate for the mayor of new york to say that behind the seal in front of cameras? >> victor, i don't think so. i think that, you know, for all of the politicians, they need to understand that words matter. you might, you know, in showing what may appear to be disrespect for law enforcement, may be encouraging a deranged person to go over the line and do what happened yesterday in new york city. and i think that's the fear that police officers have had since the whole public discussion has

started after the ferguson grand jury and after the eric garner grand jury that, you know, that you some this only shows how brutal the police are, how terrible, how they mistreat everybody in the community. and the people that actually have the opposite view, i think they had been silenced. i brought this up before. you know, you have the 15-year-old girl who performed at president obama's second inauguration ceremonies and one week later went back to her neighborhood on the south side of chicago and was shot and killed by two black gang members who thought she was somebody else. and that was one mile from president obama's south side home. and at the time in chicago visiting my father watching local chicago media interview residents of the neighborhoods there, mostly mothers who said we want more police. we don't have enough police here. we're afraid to send our children to school. they might not come back alive. and that month, january 2013,

there were 40 murders in chicago like that. the residence, you're not hearing from them. they can't be out protesting at night because they're home with their children and in many of the project areas, they're hunkered down. and that's part of what new york city police was doing with this program in bedford-stuyvesant. they park their cars at various locations in the high crime areas and that's at the request of many of the residents there. that is not the occupying force of law enforcement, trying to oppress our community. that is police officers being asked protect our children so they can walk around safely in our neighborhood. >> we heard from the president, his statement, is that officers put their life and well-being on the line for us every day and deserve that grat suitude and respect every day. >> he said. that victor, he also said a couple months ago at a public speech that everybody knows of instances of people being stopped for the offense of

driving while black. that is such an offensive statement to make against police officers. i was a cop six years at the height of being called pigs and disrespect. i didn't know one officer that did that. i certainly didn't. i didn't know of any instance of someone driving while black was the reason they were stopped. >> it may not be the reason they were stopped, but on a note that having been in a car pulled over, i will tell you that there are times when you're in a city, tom, that you know the history of something that happens and there are, i'll tell you i was in a city, i won't name the city but i was pulled over and you know that many other people who are involved in incidence with police look just like when you you're pulled over. that is something you know when you pull over. the question i think is should these officials being saying it in front of the seal as officials? i guess we have your answer there. you say the president as well, you believe he should not have had used that phrase.

>> what i'm saying is that whether it's the president, the attorney general, the mayor of new york, a governor, a senator, somebody in a position of authority like that makes statements that appear to be and can be interpreted as disrespectful of law enforcement, it will encourage people to also be disrespectful of law enforcement. and i think that, you know, this recent controversy about the professional athletes wearing the t-shirts i can't breathe and they take the field or take the court at a basketball game, you know, they've commented that they respect law enforcement. they don't mean this as disrespect to law enforcement. only as a show of support for michael brown or eric garner. but from the police perspective, they look at that and say, you know, that it's an anti-police statement. what you're saying is the reason the person can't breathe is because of inappropriate use of force by a police officer. and i think that's where it gets difficult to separate whether you're -- we're supporting the

protesters or whether you're just anti-police. and you have seen this lately in new york. you got the video of the police officers not wearing a mask, not wearing protective clothing and just punched right in the face on camera. and then the other two officers that were trying to keep somebody from dumping a trash can on to the traffic below on the brooklyn bridge, and they both end up in the hospital being checked out after they get punched and kicked and beaten on the street. i think that we have to be very careful. >> understood. >> people are talking about the protesters in new york recently shouting on the street that we want police to be killed. >> yeah. >> i think now it has crossed the line. this is not peaceful protest. this is insightful, hateful speech that can lead a derafnge person to go over the edge and do something. >> thank you. >> be sure to stay with cnn throughout the morning for continuing coverage on the

execution of those two police officers. obviously very different reactions from different people. we're also going to hear from members of the community straight ahead. after 50 years of tensions, president obama is opening diplomatic relations with cuba. >> does that mean more americans might be able to take a vacation there any time soon? we're going have a live report from havana to hear what cubans think about that. (vo) nourished. rescued. protected. given new hope. during the subaru "share the love" event, subaru owners feel it, too. because when you take home a new subaru, we donate 250 dollars to helping those in need. we'll have given 50 million dollars over seven years. love. it's what makes a subaru, a subaru. thanks. ♪ [ male announcer ] fedex® has solutions to enable global commerce

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in a historic move, president obama announced plans to normalize diplomatic relations with coopa. he warns it will take time for congress to lift the embargo against the communist nation just 90 miles from the u.s. >> but what i know deep if my moments is that if you have done the same thing 50 years ago, you should change now. >> allen gross after he spent five years in prison. now the u.s. also swapped threw cuban spies in exchange for a okay worker who was held for 20 years. the president also easing the travel restrictions to cuba. but don't rush to call a travel

agent or pack your bags. rosa, we have rosa back, good. do we have rosa? we're having a camera problem here. all right. we have rosa. let's go straight to our story and try to get rosa out of the story. >> everybody loves cuba says this man. an independent prcontractor renting this cab for $10 a day. he's 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 u.s. dollars in profit. he hopes if americans flock to havana, more cabbies like him will be cleared to drive tourist who's pay more to get around.

>> that will be foreign for that to happen. he's not the only person here expecting to see the american dream come into focus. americans tend to appreciate finer art at higher prices. others set to reap the benefits, construction companies giving havana's battered buildings much needed face lifts while hotels and restaurants take care of extra visitors. >> not everybody wins if they start flooding plaz yas like th one. >> the price go up and more tourists come, more service and more business come. >> we don't want to krb and too many starbucks and mcdonald's. we want it to be as it is.

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. >> all right. we have rosa flores live in havana for us. rosa, cuban president delivered this speech yesterday to the national assembly praising president obama. but he also reaffirmed that communist rule is not over. beyond the president and the assembly, are the people of cuba, are they ready for this change? >> you know, everyone that we've talked to from younger folks to senior citizens here, a lot of the people here are anxious to see a change in cuba. they said it's been too long. it's been decades, victor, and they're ready for opportunity. they're ready to see americans walking the streets of cuba and walking the streets of havana.

it's really interesting. as we were chatting, there is this disparity. here in havana, what we're hearing from everybody is stop it! we need this conversation to continue. we need renewed economic reform so that both countries can benefit. >> and we'll see if congress agrees with that. and then turns that mission into an embassy. rosa flores, thank you so much. >> two police officers ambushed, gunned down without warning. their killer had a long rap sheet. so why was he out on the street? we'll take a look at this next. and quit a lot,ot but ended up nowhere. now...i use this. the nicoderm cq patch with unique extended release technology helps prevent the urge to smoke all day. i want this time to be my last time. that's why i choose nicoderm cq.

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police officers are in mourning today. >> the investigation into why the officers were gunned down. it is now getting into full gear. and the brutal shooting with these two cops as they sat in their patrol car in brooklyn on saturday. it is really shocked a lot of people in the city. will oiam bratton says they wer ambushed and executed. >> today two of new york's finest were shot and killed with no warning, no provication. they were quite simply assassinated. >> their llgd killer ismaaiyl brinsley, officers chased him to a nearby subway station where he reportedly turned his gun on himself. he allegedly posted threats against police online in revenge for last july's choke hold death of eric garner. >> new york mayor bill diblasio praised fallen officers ralphael ram os and wenjin liu.

officer liu got married just two months ago. >> let's bring in our legal analyst. ismaaiyl brinsley was in and out of trouble with the law starting from shoplifting to obstruction of police officer, many other charges. why do you think police, i guess dshgs not have him on their radar before this? >> good morning, victor. you know, it's really a tough scenario. our criminal justice system is about punishment and rehabilitation. when you have people who engage in senseless tragic acts like this, it just hard to account for everybody. and so as we know, victor, in addition to engaging in this horrific act of violence, completely unnecessary, inploept and cowardly, he, of course, turned a gun on his girlfriend prior to that, prior to that in maryland before coming here. and so it just makes you wonder. police, of course, do the best they can, victor. they can't account for everybody who is out there who will

inflict harm no matter what the circumstances are. >> you mentioned shooting of the girlfriend in baltimore. en that information was trans mitted just moments before the shooting there. you brought up an interesting element. was the technology antiquated used to get this to new york? should that have been there quicker? >> you know, it certainly could, have victor. a lot of things certainly could have happened. you even wonder in the event that technology was not antiquated and did get to new york on time, could it have been prevented? the meese are there. they're doing their job. they're on a task force and helping to protect and serve the community. essentially, they're assassinated. what can you do to prevent that? it's just very difficult that you know when he is traveling here. what has intentions were. do you know where he's going to be. in the event you know where he's going to be, do the police have time even, you know, to draw their firearms and to protect

themselves? and so it's random acts of violence, specific targeted acts of violence. but when a person gauges in this type of random behavior, it's very difficult to guard for. there are a number of things we can point to. tend of the day, you have to ask yourself, how do you stop the madness and how do you stop this even if you have technology, even if you're on alert for it? it just makes no sense. >> i asked tom fennen with -- fuentes about this. the mayor was asking r asking for people to look at the tweets, look at the postings on social media. are there ways that people can look at this in real time and move on it so that, you know, this kind of thing when you have that language out there, they get a heads up in some way? this guy was not a good guy? >> you know, it's a great question. i think it brings about a couple of issues. number one, it's a needle in the hay stack issue. social media, as you know, is rampant. we have instagram, twitter,

facebook. and to keep track of everybody who are posting things becomes very problematic. and then you separate out the fact from the fiction. who are those people who are simply ranting and venting and who are those people who really mean real harm? and then there is a third element and that is the supreme court now evaluating whether or not messages like this are actionable criminally. and that is it a first amendment right in order to state what you want? or is it something that the law could guard against and punish to ensure things like this don't occur. we'll see what the supreme court says about this. you know, you look and you wonder, you know, how many things can be done here and notwithstanding all the technology, could it have been prevented? i don't know. it just has no place. it has to stop. it is unwarranted. and it just really boggles the mind. it's a sad day in new york city and throughout the country. >> you're right there. and it's hard, right?

to know like who -- it's a freedom of speech issue. do you know, is this a real threat? is somebody just playing around? just wants to get a rise out of somebody? >> you also have to consider the billions of social media accounts from twitter to instagram to facebook and who is monitoring that. friends may think that they're just saying it in jest. but then what happens after that is most important part. all right. >> we have been following this story throughout the morning. the two new york police officers gunned down in their squad car. we'll have the latest on the investigation and how the community is reacting, responding to this. a threat and a promise. this is another story we're following. north korea vowing serious consequence it's the u.s. officials continue to assist the communist country. if they're responsible for the massi ivive cyber attack on son. (vo) nourished. rescued.

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17 minutes until the top of the hour now. just one day after president obama vowed to take action against north korea for that crippling scyber attack, the

united states is turning to china for help. >> north korea threatened serious consequences if they continue to tie the communist country to the attack. h cyber hackers are out with a new message for the fbi. i want to bring in our reporter to talk about this. what can you tell us about the new message from the hackers to the fbi? what are they saying? >> well, it's in broken english. the message is really clear. it is essentially a thinly veiled threat to the fbi that if they move forward with this investigation, there will be a gift waiting for them. i believe we have a graphic that i'll read to what you the actual quote is. part of the broken english here. this is how they sent it. the result of investigation by fbi is so excellent that you might have seen what we were doing with your own eye. we congratulate you success. fbi is the best in the world. you will find the gift for fbi at the following address. enjoy. now what is interesting about

this investigation now is the focus is shifting from inside the borders of north korea to north korea's neighbor and benefactor, china. the average north korean doesn't have access to the internet. it's one way they keep the population under control by restricting outside influences. so what investigators believe these hackers are are doing because north korea doesn't have internet instra structure is crossing over into china and they're operating from there, launching cyber attacks from places like hotels where they can have high speed internet and the ability to hack without directly being traced back to their home country. a senior obama administration official spoke to cnn about this and it's another quote for you. we discussed this issue with the chinese to share information, express our concerns about this attack and to ask for their cooperation. china and the united states have expressed the view that conducting destructive attacks in cyberspace is outside the norms of appropriate cyber behavior. so apparently the united states believes that if they're going to get to the bottom of the sony hack, they'll have to work with china. >> yeah, absolutely important

that they work together on that. just very quickly do, we have any idea what they're talking about when they say a gift? >> well, we've seen what the hackers are capable of. what they did with sony where they stole a massive amount of information and then used it to attack the company. what they will be able to do against the fbi, that is anyone's guess. but one thng we have been able to learn this week, don't underestimate the power of the hackers that u.s. government believes are coming right from north korea. >> something they're investigating. will rippley, thank you so much, appreciate it. let's gao to cnn military analyst general spider marks. first, general, what is your reaction to this latest message from the hackers mocking the fbi? >> victor, good morning. frankly, what the hackers are doing is they're having a very open, very cynical conversation with a whole host of folks as can you well imagine now that are involved in the forensics of who they are and what their next steps might be. what we see is a very well

planned and very well executed cyber threat and attack that has taken place and we can expect that this is probably we should expect it more like this will occur. the thing that i think is most interesting about all of this is that wrapped in this attack against sony, it truly is an opportunity that gave the north koreans and let's call it what it, is north koreans with help by the chinese a cover for action in intelligence terms. that means they're looking at this film and using that as the justification for their attack. really what they're doing is increasing capabilities and reconnaissance, surveillance and techniques of cyber exploitation. it's a domain of wars. siber is a domain of wars. this really is a military operation. it's not as the president indicated cyber vandalism. this is an act of terrorism. and we need to take this very seriously. i know we are. >> so you use the phrase here it was the north koreans with cover by the chinese.

is it defined to think that chinese would help in this investigation that the u.s. is asking for? >> oh, not at all. no. yeah, i would think that the chinese will say, yeah, we're good partners. we're going to step up and help. our relationships in that part of the world are not unlike in relationshi relationships, they're very complicated. it's a dance that we have and the six parties that are involved in the peninsula, the korean peninsula, russia, china, u.s. and japan and north and south korea have always given north core an incredible amount of deaf reer ens. this is a very powerful nation. yet extremely isolated and extremely interesting when you look at it. it's almost a theocracy. it's just an odd place. yet with some immense capabilities. so it's not unusual at all that chinese say, sure we'll help. we'll do that on our terms and we'll continue to have this

relationship that we all agree to. it's a bit odd. >> north korea warned of serious consequences. frankly north korea warned of serious consequences many times. >> all the time. >> but if the u.s. continues, of course in, this investigation, they say that they're going to continue these cyber attacks. what is north korea capable of? >> well, we see right now, look, they were able to get into sony, victor. they were able to get what is called root access, administrative access. these are the folks that run your internet access and your end prize, your network, whoever you are in this case it's sony. very, very broad, huge enterprise. so they were able with great speed to get in there. then they have the permissions, because of what they took, to get anywhere in their enterprise they can. so what they did with sony was very selective. we can only hope that they won't go to, you know, the financial

institutions or escape the systems. so we certainly should expect more from these guys. and you're spot on. everything to them is an egregious act. and they've threatened everything in their past. and the bell he koes activity is not unusual. >> general marks, thank very much. >> thank you. later today, cnn's candy crowley sits down with an interview with president obama. why he is standing by his comments on sony. that interview airs right here on cnn at 9:00 a.m. eastern. and we'll be right back.

december's one to watch series, we're exploring the world of street art. >> the subculture was once associated with vandalism. but things are beginning to change. we're going to meet a graffiti art frist chicago who is pabting legally for the first time on his own streets. >> i take really every day simple basic kind of throw away things and reposition them and put them back out into the world to try to communicate with people something much deeper. i live half a block from the train and the train would rattle my windows. the train line was sort of the main artery for this unique movement and art form that was being created before your eyes. when we used to run tracks, you run the grates. the third rails here. if you hit that, you're fried. so it's really exciting place. >> being a young kid that had a

need to express myself, graffiti was just naturally captivating and just completely consumed my entire life and took over my life from about 12 years old on. >> in 1993, chicago's mayor richard daily launched a program to eliminate all graffiti from the streets of the city. it was called the graffiti blasters. works wore routinely painted over and constitutional law was passed to ban the sale of spray cans. >> i was always told, no, i was always arrested and locked up or beat up by the police or, you know, it's very, very rough city. one of the most anti-graffiti cities that i've ever seen in the world. >> but things are beginning to change. >> you look around and all the cool neighborhoods have street art. and that in graffiti co-exists in that. those are the neighborhoods that are being sought after for some of the highest property values. >> be sure to check out the full

show at cnn.

the shooting death of two new york police officers comes at a difficult time in this city. sen tensions are strained between the police and the mayor's office. >> and also between officers and

the communities that they patrol as well. in the aftermath of yesterday's shootings, reactions were divided. we have the public safety administrator for the dekalb county police in georgia. i want to ask you do you think this was a reflection in some way an expression of somebody in the community who just didn't agree and was frustrated with the fact that you have those cases of the african-american men in some way and some form were killed by white police officers? >> let me say this first thing this morning. my condolences goes to the family and friends of the slain officers and men and women of new york city police department. that's the first thing i want to do in regards to your question. there's some mounting evidence even you all have present the as of last night and this morning

that there is some evidence that suggests that the assailant here in this case was responding to the most recent cases that become -- that have become very noble in this country. >> we have seen comments from public officials blaming the mayor for the deaths of those officers. i want you to see this. the head of the new york sergeant's association said the blood of two executed police officers is on the hands of mayor diblasio. may god bless their families and may they rest in peace. and former new york governor george pataki tweeting this, sick ened by the barbaric acts that are the outcome of devisive anti-cop rhetoric of eric holder and mayor diblasio. what do you make of the back and forth, these comments? do they help? do they hurt? or does this justin? >> well, none of the comments

right now are going to be helpful. what this nation, what we need to do and for all of us, we need to come together as a nation both as police and community right now. and begin to partner and solidify our partnership. the greatest majority of the people in this country are very strong supporters of police. as i am and many across this country, we're all very hurt in the loss in the way that these officers lost their lives last night. so i can only hope that some point here real soon that all of us, urban leadership positions across this great country, continue to look forward. the president and the attorney general both i know are strong proponents and supporters of police. they're going to do everything in their power to make sure and i want to be part of that as all of us in this country need to be, we need to be part of moving forward, making sure that our communities and our police as we go through this very difficult

time right now in this country's history is that we join ourselves and find resolution and not begin to find blame. millions of people across this country who are looking to all of us for leadership and we have to provide that leadership regardless of what our feelings may happen to be. but the loss of these two lives last night is just very painful to all of us. and we're all -- all of us must continue to stay focused on the fact that we are a nation of one and not be divided right now. and all of us again who are leadership positions will have to come together and lead this country. >> all right. thank you so much. we appreciate your insights. he brings up a very good point. this is not a broad brush stroke. you have to look at individuals and specifics and not get caught up in the rhetoric. >> and on both sides. the alleged killer of two new york police officers reportedly made threats online. >> we're continuing to follow breaking news. the latest on the killings that

new york mayor and police commissioner are calling an all out execution of the city's finest. that just ahead. my name's louis,

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no warning, no provication, now outrage after two new york city police officers are gunned down on patrol, targeted about a career criminal. investigators say was hell bent on revenge. the u.s. asked china for a helping hand after a hack attack that brought sonny to their knees. will china oblige the req. to battle the cyber assault. and the clexclusive one-on-e you don't want to ms. candy crowley sits down with the table and nothing is off the table. you hear what he says this hour. >> two new york city police officers were gunned down in new york in cold blood. the gunman is now dead.

>> this investigation is kicking into full gear. it is focusing on threats made online. police say suspect ismaaiyl brinsley shot himself at a subway station after cops chased him. there. >> minutes earlier, he ambushed police officers wenjin liu and ralphael ramos as they sat in their squad car. shot both men in the head. a alex an dra field has the storey. >> reporter: hundreds of police officers united in grief for the assault two of their own. >> two of new york's finest were shot and killed with no warning, no provication. they were quite simply assassinated. >> reporter: with those words, a visibly shaken new york police commissioner alongside new york's mayor talking about the deaths of officer ramos and officer liu. liu, a seven year veteran married two months ago.

ram ramos, a two year veteran turned 40 this month, married with a 13-year-old son. they were killed ambush style saturday afternoon as they sat in their patrol car on a brooklyn street. >> the suspect was identified as 28-year-old ismaaiyl brinsley walked up to the police car. he took a shooting stance on the passenger side and fired the weapon his 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 have actually even seen their assailant, their murderer. >> reporter: police say officers chased ismaaiyl brinsley to a nearby subway station where he reportedly shot himself to death on the train platform. a semiautomatic handgun was recovered near the body. brinsley arrived in new york from baltimore but had a

residence near atlanta and apparently had connections to brooklyn. police say earlier in the day he shot and seriously wounded a woman believed to be his ex-girlfriend in baltimore. police there received information that brinsley made threatening comments about officers on social media sites and they sent a warning to police in new york but that message came almost at the same time the ambush happened. these officers were shot execution style, particularly despicable act which goes at the very heart of our society and our democracy when a police officer is murdered, it tears at the foundation of our society. >> reporter: new york police say there is no indication brinsley was connected to any terrorist group. >> there's blood on many hands tonight. >> reporter: the deaths two of officers highlighted mounting tension twenz police union officials and the mayor whom they accuse of putting officers' lives at risk with his support

for recent protests vofrg the eric garner choke hold death and the police chooting of michael brown. >> those that insighted violence on this street under the guise of protest that tried to tear down what new york city police officers did every day. we tried to warn. it must not go on. it cannot be tolerated. that blood on the hands starts on the steps of city hall in the office of the mayor. >> reporter: in an apparent show of defiance, police officers gathering at the hospital where the slain officers were taken turn their backs on the mayor as he entered for saturday's press conference. officer liu and officer ramos should have returned to work here. they were on assignment in a different neighborhood, a higher crime area where they were gunned down fortune forms they

wore. that is what is sparking this conversation and shaking people in this community and across the country launching this wider conversation about police officers in our communities and what this means for them. >> alexandra if i could just follow, is there anything that police officers and the mayor are going to do to repair this rift here? >> it is certainly a rift. it is one that we have seen not only coming to a head right now as the patrolmen's union speaks out, as you hear things from former governor pataki talking about what has happened in the city this rift that we have seen growing between the mayor and the police. but right now people seem to want to focus at least on the victims of this, the two officers that were killed. the mayor did not address any of this when he came to the hospital. he spoke in a press conference last night. he talked about this being an assassination of two officers, the loss two of good men, not responding to any of the denunciation that's have been lobbed at him. again, this has been going on.

this is a city that's seen protests here. >> all right. thank you very much. let's take a different perspective to that question and toss it now to cnn law enforcement analyst and former fbi assistant director tom fuentes. she asked her is there anything that is happening to repair that rift? ooim i' i'll come to with you how is that repair between the mayor's office and the officers of new york? the chairman is saying the blood on the hand starts at the city, steps of city hall. that is stark imagery. how do you fix it? >> you're right, victor. that is pretty extreme language. and, you know, i think it's damaging rhetoric on its own. we don't need that either. but i think the only way it's going to happen is if the mayor comes out repeatedly and strongly in favor of the police. i think the police have just had the impression, you know, whether it's deserved or not, that they've been thrown under the bus in a way about it mayor. that the mayor, it's one thing

to support protesters. it's another thing to say that their cause is absolutely correct. the police are bad. the police have committed brutality. he fears for his own son on the street. you know, statements like that really, you know, really offended the police. the rank and file police officers that are on the street and deal with people like, you know, hoodlums all the time. i think in this case, again this shooter shot his girlfriend first. so obviously she's not a police officer. hit nothing to do with, you know, the prior rhetoric or incidents concerning police. but then he decided to go and post all of this hateful rhetoric and go kill two police officers. so there is more to it with the shooter than just, you know, the sent. of anti-police. i it this mayor is going to have to show the police that he respects them and encourages all of the people of new york to respect them and, you know, we've seen some question of this. i mean just this week the head of the police union circulated

petitions among the rank an file for officers to sign if they were killed in the line of duty and did not want the mayor to attend their own funeral. >> we have that. let me read a line from that. it says that his refusal to show police officers support and respect they deserve, he asked they should not attend the mayor and other city council person. it would be an insult to that officer's memory and sacrifice. i want to go to something that former new york governor george pa tack qui tweeted. he tweeted sickened by the barbaric acts with sadly outcome of eric holder and mayor diblasio. in addition to this comment from pataki, the question is, these are real concerns by the mayor. i take him at his word. he is concerned for his son's safety as many people are. is the question that he should not say this in public, he should keep these to himself and should he not even criticize

officers when they are wrong in thinks opinion? >> no. i think he can. and he can still do it in a respectful way. the comments like that, and there's been a lot of this come out in the last couple of months. i've been on the air talking when, you know, someone published a statement saying how to survive an encounter with the police. and, you know, i said wait a minute, this is like saying how do you survive an encount we are a rattle snake or a grizzly bare or a wolf? i mean the police are not out there killing people just, you know, for the fun of it. and, yes, it happens. yes, there are officers that use excessive force on occasion. but given the tens of millions of police encounters with the public every year, you have really not that many incidents. yes, those police officers need to be brought to justice. but, you know, that is the problem in this situation. >> thank you. >> new york shooting suspect, he was no stranger to crime,

ismaaiyl brinsley earlier shot and seriously wounded a woman believed to be his ex-girlfriend. that happened in baltimore. and he had been arrested several times in georgia where he had a home. so those charges included shoplifting and illegal weapons possession, property damage and obstructing a police officer. brinsley had also suggested on social media he planned to kill police officers. cnn's lori siegel has more. good morning. >> as we piece together this tragedy, we're also piecing together the digital footprint of the shooter behind this horrific event. he had an extensive social media profile. i want to give you a little sample of that. the last post this shooter posted on facebook, let me read this to you. he said i always wanted to be known for doing something right burt my past is stalking me. my president ebt is haunting me. he said why live if you don't love to live? also, when we heard from the nypd, when we heard from commissioner bratton, he spoke

quite a bit about these digital clues and staingram and how the shoot her posted on instagram and piece together the motivation behind this tragedy. i want to get to one of the suspicious posts, allegedly posted by the shooter. he said "i'm putting leans on picks today. they take one of ours, let's take two of theirs." he also says this may be my final post with a picture of a gun and a emoji bullet. you really begin to wrap your head around the clues and motivation behind this horrific attack. back to you. >> thank you, lori. appreciate it. we talked about the embarrassing tweets, information about hollywood stoorz. there is also the social security numbers and health information, the confidential memos. so much more private information was revealed in that crippling cyber attack on sony. now the u.s. is calling on china to help battle the hackers. >> plus, president obama sits down with cnn for an exclusive interview. why he is standing by his

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get this one done. ask your healthcare professional about prevnar 13 ® today. china and the united states have expressed the view that this is outside the norms of appropriate cyber behavior. >> hackers issued a new message mocking the fbi. the result of the investigation by the fbi is so excellent that you might have seen what we were doing with your own eye. we congratulate you success. fbi is the best in the world. you will find the gift for fbi

at the following address. >> a link in that message leads to a youtube video called "you are an idiot." so the fbi, of course, declined to comment. president obama says it was a mistake for sony not to move forward with the christmas day release of "the interview." that is the movie that the north koreans were upset after the threats of hackers. >> our chief political correspondent sat down with the president for an interview. first of all, we saw the message from the north korea just dripping with sarcasm. did you find that president had any kind of april sipetite to ce to engage with north korea? >> i'm not sure he wants to engage with north korea. he also wants to make sure that there is some response to this. i think, you know, we're all

sort of sitting around trying to figure out what that might be. will that be a counterattack? he definitely as we saw in the news conference and when he sat down with me thinks that sony made a mistake by being intimidated into not distributing the movie. as you know, the sony chairman told fareed zakaria that's not how it worked. it was the movie theater that said we're not going to run this thing. the president's response is i wish they called me, maybe i could have called the movie theaters. he is very interesting on trying to -- we've heard from some on capitol hill saying this is an act of war by north korea. we need to respond very strongly. i wanted the president to put it in perspective. >> do you think was an act of war by north korea? >> no. i think it's a act of cyber vandalism is that is very

costly, very expensive. we'll respond proportionately. >> i can tell you the word cyber vandalism, senator john mccain who is also on the show found the president underplaying what mccain who soon to become the chairman of the senate foreign relations committee thinks is a very serious breech much he's going to hold hearings on it. >> i understand you also had a chance to talk about president putin and russia. >> it was in the context of cuba. i said to the president, you know, looking at cuba, your critics are saying here is just another case where this president is getting ruled by dictators. he is giving them something for nothing. he is the one that actually brought up putin. >> there was a spate of stories about how he is the chess master and outmaneuvering the west and mr. obama and this, that and the other. and right now he's presiding over the collapse of the

currency. that doesn't sound like somebody who has rolled me or the united states of america. but as the president's critics point out, putin still is in crimecrimea. nonetheless, he feels very sort of gives of, i think we saw this in the nudz conference as well. there is a confidence here sort of a post midterm election confidence to the president who is really using powers as much as he can to affect changes he really believes in. >> candy, i'm so happy that i'm actually on the air during this day to acknowledge you and recognize that this is going -- your last day here at cnn. you have been an amazing mentor to so many of us here at cnn. and i just wanted to really congratulate you on your next moves. you know, there are so many stories, i know you'll share many on your own show. but is there one moment in your

career, something that stands out that was really particularly special or impactful for you because you really made such a difference for so many of us. >> honestly, i think it is hard -- i mean i cover the impeachment trial of bill clinton. but it's very hard as a journalist not to look at 9/11 as the day that just put your journalistic skills to a max test which is trying to tell a story that you're not trying to get sucked into. i think in a horrible way, that day is where i look at and i, you know, was reinforced by what journalism means just as a way to tell people what is going on. but how tough it can be when you have to cover other people's stories that are so incredibly tragic. >> yeah. i appreciated the time 2008 when

we were able to cover the election together. just the historic occasion. are goug sleep in on sunday mornings? >> you bet. and maybe a couple of other mornings. but, you know, i'm not retiring so much as i am leaving cnn. it's been 27 years. it's been terrific. we're friend. we'll remain friends. and i feel that way about a lot of people here. >> all right. we do as well. candy, thank you so much. it has been absolutely a pleasure. >> thank you, candy. be sure to check more of candy's interview president obama today at 9:00 a.m. eastern. and pro probably many of you packing your bags to get out of town for the holidays. >> it's hard enough to deal with the crowds, but stormy weather might really bring out the grinch in a lot of folks. your holiday forecast is next. dad,thank you mom for said this oftprotecting my future.you. thank you for being my hero and my dad.

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north korea's internet traffic goes through china. meanwhile, hackers issued a new message yesterday mocking the fbi. a link leads to a youtube video titled "you're an idiot." >> ali is in the hospital with pneumonia. his prognosis is good and he's not expected to be hospitalized for long. former world heavyweight champ is 72 years old. the son of chicago mayor ram emanuel was robbed and beaten near his home on friday night. that is according to chicago city hall. zachry he manu help a cell phone stolen and received medical attention for his injuries. chicago police now are, of course, investigating. and it's an early christmas for madonna fans. she released six new songs on itunes yesterday morning trying to regain the upper hand after early unfinished versions of her new album were leaked online. her manager is asking for help

in trying to figure out how her album got out. time to check in with dr. sanjay gupta for a look at what is coming up at 7:30 eastern. who doesn't love a top ten countdown? even when it comes to health. you probably know that ebola was the biggest health story of the year. but see how many of the others you actually remember. we got that coming up at the bottom of the hour.

we're pushing forward on the big story we've been fwolg, the shooting of the two police officers in new york city. here is the latest on what we know now. the gunman who killed those two nypd officers, he is now dead. >> okay. the investigation into why he did what he did, that is just beginning. and it's focusing on threats made online. police say suspect ismaaiyl brinsley shot himself at a subway station after cops chased him there. >> now minutes earlier, he ambusheded officers wenjin liu d

ralphael ramos. people try to pull apart this shooter's social media account to get more answers about the motive here. listen, we'll see you back here at 8:00 eastern. >> sanjay gupta, md, starts right now. welcome to the program. why is mumps going around the national hockey league? we have that story. plus, we put together the top ten health stories of 2014. some of them are going to surprise you. what do you think number one is? first, it is a race against time. what the world health organization calls one of the biggest threats to global health today. now we're not talking about ebola. we're not even talking about the flu. we're talking about common infections and what happens when we can't treat them. perhaps the biggest medical breakthrough in history was the discovery of antibiotics. that was in the late 1920s. the first as you know was penicillin. the compounds like this one remained nearly unchanged for a