good evening. thanks for joining us. two main threads this hour. remembering the fallen police officers in dallas. you see a vigil just beginning outside city hall. and protesters back on the streets in major cities across the country just as they were in dallas, raising voices against the killings of african-americans in encounters with police. demonstrations tonight in chicago, sacramento, california as well as atlanta. joining us by phone is charlie demar of our chicago affiliate wbbm. charlie, what's the scene in chicago? charlie, can you hear? it's anderson. you're on the air. what's the scene in chicago? >> reporter: good evening. about 8:00 local time here, these marchers are going on about their fifth hour marching the streets of chicago. shortly after i checked in with you last hour, the marchers regrouped, took a little break, came up with a game plan. there was a couple thousand marchers at that point. now the crowd has dwindled down

to about a couple hundred. they mostly stayed on the sidewalks. it's still a very busy part of chicago. we just saw the crowd actually move from the sidewalk rushing the street and i saw a woman get detained. it's the first person to be put in handcuffs today. i saw the tail end of it. all i saw was this woman push a cop but i didn't see what led up to that. this crowd is much smaller but much more rambunctious than we saw in earlier hours. >> thanks very much. the pictures are from a short time ago, not live. now to atlanta. cnn's polo sandoval is there. it looks like from the overhead shot we're seeing right now, not as large a protest as it was in chicago earlier. do you have a sense of numbers overall in atlanta? >> reporter: yeah, anderson, we have seen hundreds of people. just to bring things into perspective or add some context here, we did hear from atlanta's mayor earlier this morning

saying that today would be day five of demonstrations that they have seen an estimated 15,000 people over those last five days take to the streets. only 25 arrests until today, anderson. i have to tell you, we have be walking with these demonstrators and really speaking to them and today was the first day that i actually witnessed some of these officers eventually go into the crowd and begin to pluck out certain individuals. we have seen at least 12 arrests or so. however, the crowd here continues on the sidewalk because we have heard from authorities here in atlanta over and over again saying people are free to protest and to hold these demonstrations and marches as long as they stay off public roads. because that is now a public safety issue. so as a result, we are now seeing people on the sidewalk here making their way through to the buckhead region. if you are familiar with the atlanta area it's basically an upscale shopping, dining area here in atlanta. that's one of the reasons why the mayor has increased

security. one of several reasons why they are now on the streets and we are seeing police on the ground as they continue to make sure that at least people stay off the sidewalk, but you talk to people here and ask them if they know where they're going and at this point, many of them will tell you they are just following that drumbeat, following that very familiar cry for justice. >> polo, thanks. president obama, vice president biden, former president george w. bush and hundreds of members of local law enforcement will gather tomorrow afternoon at a concert hall in dallas to remember the five fallen officers and help the city heal. right now as you saw briefly at the top of the hour in city hall plaza, people are gathered for a dallas strong candlelight vigil. martin savidge is there for us now. what's been going on? >> reporter: well, i have been trying to gauge the mood of the people here, watching for a long time. certainly sadness. it's very somber. there are also people coming together. you see a lot of officers in uniform hugging, hugging the public. this is a chance for again, the

community to come together and grieve, but also to share in the pain they are going through. that's happening right now. there are family members that are here of the officers. there is also a huge representation of the public and it's a very wide representation of people from all walks of life. it's only just now getting under way. >> let's just take a look at this. they are obviously showing the images of the five fallen. let's watch and listen. martin, how long is this vigil tonight and what do we expect to

happen over the course of it? >> reporter: well, there's going to be a number of speakers and each person that speaks will represent one of the fallen officers. so in some ways, you could say it's almost like eulogies that will be delivered. on top of that we also expect to hear from the chief of police, david brown. he's a man who you would have to say today has got to be running almost on empty when it comes to both his level of energy and his emotions. he has an incredibly difficult week ahead. the funerals of five others would tear out the heart of just about any police chief. yet, that's what he has to go through. of course, the whole community has to go through that. but he's the man in charge. it will be very, very hard. >> let's listen in again. >> these heroes weren't just outstanding police officers. they were fathers, sons and husbands. they were neighbors, coaches, and church members.

officer brent thompson was described as super nice and a friend to everyone. he was a person you would ask for help and he would have your back. he was married two weeks ago to d.a.r.t. officer emily and was the father of six children. officer zamarripa was a navy veteran and scored three tours in iraq. he was an avid sports fan. he loved the cowboys and texas rangers and wwe wrestling. he was a proud son and a loving father of two children. officer michael krol was from michigan, who loved and talked a lot about his mom. enjoyed fishing with his father. never caring if he caught anything, as long as he was spending time with him. he was described as a loving guy with a big heart who liked

country music, the detroit lions and the detroit tigers. senior corporal loren ahrens was a former college football player and was described as a lovable giant who was always laughing. he was also known for always being there to have your back. lorne was married to detective katrina and had two children. sergeant michael smith was a good person who was always trying to help others. he was nearing retirement but continued to serve the citizens of dallas like it was his first day on the job. he was married to his loving wife heidi for 17 years and had two children. to our country, i pray we can pause and take a step back. when everything is negative and full of hate and anger, there can be no solutions.

we must listen to each other rather than simply talking at one another. we will not let the cowardly hate-filled acts of one man divide our city and our country. i believe in our police department and i believe in our country and its citizens. i also believe we can rise and face these challenges together. if we are to hope for a better life, for our cities and communities, our nation must unite behind law enforcement. to my fellow officers, i ask that you honor the legacy of our fallen brothers by continuing in their footsteps and protecting and serving the citizens of dallas with the same honor and integrity exhibited by these five heroes. to the families, we want you to

know you will always be part of the family in blue. your loved ones will never be forgotten and their sacrifice will long be remembered. i would now like to introduce dallas police chief david brown, who has done an outstanding job in this crisis. [ applause ] >> thank you. thank you. thank you. faster than a speeding bullet.

more powerful than a locomotive. able to leap tall buildings in a single bound. look, it's a train, it's a plane. no, it's superman. as a young child i ran home from school to hear that so that i could see the reruns of the television series "superman." i love super heroes. because they're now like what i aspired to be when i grew up. they're like cops. they're like police officers. super heroes. and cops are mission-focused. give us a job to do, we'll focus on accomplishing the mission. so what's our mission today?

it's helping these families understand how to conquer this tragedy. what do we tell you all? well, being a person of faith, i always refer back to the good book, the bible. and we have an example of how to conquer this tragedy. when the good lord was crucified and rose on the third day, alive, he said oh, death, where is your sting? oh, grave, where is your victory?

families, we love you. we love you with everything we have. we are now your surrogate family members. we are your brothers and your sisters. when you need us, you call. because we will not only be loving you today, we will be loving you always. always. until the end of time. we will be loving you until you are me and i am you, always. always. faster than a speeding bullet. more powerful than a locomotive. able to leap tall buildings in a

single bound. look, it's a train, it's a plane. no, it's patricio zamarripa. look, it's brent thompson. look, it's michael krol. look, it's lorne ahrens. look, it's michael smith. godspeed. god bless you. god bless the dallas police department. thank you. >> that was dallas police chief david brown. just ahead, two men remember one of those officers who chief brown just named. he was their brother. the first officer in the history of the dallas transit police force to be killed in the line of duty. later, new developments in one of the police shootings that ignited such protests. details ahead.

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two different reactions to the news of the last seven days. the unfinished business of decades, a unity vigil for fallen police officers in dallas, which we just saw, and protesters on the city streets across the country marching against police violence. there is certainly no shortage of hurt anywhere tonight. in dallas, sacramento, atlanta, the texas town of corsicana where dallas transit police officer brent thompson is being mourned by old friends and neighbors and of course by his family. joining us, his brothers darryl and lowell. first of all, i just want to say i'm so sorry for your loss. i'm so sorry for what your family is going through. darryl, what do you want people to know about your brother? >> you know, he was a hero and everyone knows that now. the show of support we've had is outstanding and he was just a very loving, christian man. he worked hard for his family

and he worked hard to do the best he could to provide for them and he died, he laid his life down working to protect these people of the community of dallas and he's just a great guy. big heart. >> lowell, i heard a friend last night speak at a vigil who talked about how kind brent was when her husband had a stroke. he looked after her, made sure she had everything she needed as she was going through a very tough time. your brother sounded like an incredibly caring guy, not only in the line of duty, but in his personal time. >> he really was. he was a very caring guy. that was shawna. i actually graduated high school with her. he did, when her husband had the stroke, it really hurt him and he really went out of his way. it really wasn't out of his way because that was the way he was to help out and, you know, many people have come up and said he's the type of guy that would give you the shirt off his back and that's the kind of guy he was. he really was.

>> darryl, he had incredible career. he spent time, he served as a civilian in iraq, training police officers. he also served in afghanistan. i understand while he was in iraq, he actually called to check in on your newborn daughter who had just had surgery. >> yes, sir. we instant messaged a lot when he was overseas and then when my daughter was born, unfortunately she had to have some heart surgeries and he called in the middle while we were waiting to hear news and i was trying to be the tough guy of the family and keep it together, and about halfway through talking to him, he broke me down. i started crying a little bit. but he reassured me and that's the type of guy he was. he was sitting in iraq where every day someone was trying to kill him, and he was calling and trying to comfort me, you know, sitting safe in houston, texas, because of the situation my daughter was in. that was him. he always looked out for everybody before himself.

he was really unselfish and loving. >> lowell, his fellow officers talked about how brent was like a brother of their own, saying he was always willing to do anything for anyone. did he always want to be a police officer? did he always want to work in law enforcement? >> i believe he did. he went from the marine corps, even in the marine corps he became an m.p. in the marine corps and he got into law enforcement. he fell in love with service. if it wasn't -- if he wasn't going to be in law enforcement he would have been in some other kind of service to the community or to our community and to our country, because he was all about service. i think he always wanted to do law enforcement. coming from the law enforcement background, all the guys that i have dealt with and that knew brent, they love him. he was a cop's cop as they were saying all over the place now. but he was also the kind of officer that our country would want on the streets dealing with

the public, because he never met a stranger and he never met someone he really didn't like. that's the way brent was. even with individuals he was dealing with professionally, he went out of his way to make sure that -- you know, he knew the contact with law enforcement was an important contact for folks. he went out of his way to make that as least painful for everybody possible. that's the way he performed his duties. >> darryl, the risks he took obviously in iraq, also in afghanistan, he was out working, mentoring iraqi, mentoring afghan police officers. incredibly dangerous position to be in, really out on the front lines. i read also, brent just got married a couple weeks ago. i cannot imagine what this is like for all of you, for his wife, for everybody. >> you know, it's always hard

losing someone but under the circumstances where it was so sudden and unfortunately, it was very public. it was on, you know, they were broadcasting live on television in the dfw area and it just wasn't a good situation. everybody was in shock and everybody still is kind of in shock. the reality's starting to set in. it's a very tough situation. >> yeah. well, i know brent also was a father of seven kids. he was also a grandfather. our thoughts and our prayers are certainly with all of them and all of you tonight. darryl and lowell thompson, thank you so much for talking to us and letting us know a little bit about what brent was like. >> i did want to mention that his wife emily wanted to thank everyone for their support and their love, and his kids. they wanted to make sure that everyone knew that they really appreciated all the support and love that they're getting. he loved his kids more than anything else. he was a great dad and he really, really loved his kids. and he loved his nieces and

nephews. he was a really, really a family man. >> very much so. >> he's a great loss to our country and our state. >> yeah. it certainly sounds like it. again, i appreciate that in your time of grief, you are willing to let the world know a little bit about the brother that you lost. thank you so much. >> thank you. >> we hope to learn more about the other officers who lost their lives in the days ahead. much more ahead tonight including the latest on the protests taking place across the country tonight plus new details about philando castile, who was fatally shot during a traffic stop outside minneapolis. the video his fiancee live streamed helped spark the protests that continue tonight. what court records reveal about his previous interactions with police and does it suggest he was racially profiled? [beekeeper] from bees to business expenses,

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the breaking news tonight, protesters out again across the country from sacramento to chicago to atlanta. we have been showing you the protests over the last hour and a half. in dallas, a vigil under way for the five police officers killed at a protest last week focused on the fatal shootings by police of two african-american men. parts of all these incidents of course were captured on video. philando castile's fiancee live

streamed the aftermath of his fatal shooting. authorities have not yet released any dash cam video of the incident. however, we have learned that before his fatal traffic stop, he had been pulled over 52 other times since 2002 for offenses such as driving on a suspended license or having no proof of insurance. joining us, cnn law enforcement analyst harry houck. also georgetown university sociology professor michael eric dyson, contributing writer for "new york times" and author of the black presidency, barack obama and the politics of race in america. if there is this dash cam video, why not release it? we have seen dash cam videos released early on in investigations in other cases. >> this police department isn't releasing too much about this case here. i'm for that. the reason why i'm for that is you release something like that video, and you don't release the information about the investigation, somehow it will be misinterpreted somewhere and it gives talking points for people who are anti-police. as far as i'm concerned, the

best way to go is to wait until the investigation is completely concluded, then release the information. >> michael, do you buy that? >> no, i think brother houck is giving the benefit of the doubt. i understand that. but most police departments would not be reticent in the face of such public attention. think of michael brown's case when he was seen snatching cigarellos from a store, they released that in a way that shaped public perception. even though i certainly hold the dallas police department from what we have seen of them and what i know of them in high regard, the reality is there may be something more there and it's more complicated than -- >> i think the first time i saw that was on youtube. >> it was released by the police, though. >> oh, okay. >> harry, it is interesting, this came out today that mr. castile was pulled over 52 times since 2002. people see this through the lens of their own personal beliefs. some people see that and say look, he's got a police record.

others see that and say wait a minute, pulled over 52 times since 2002 and i think about half of those cases were tossed out. that's racial profiling. >> well, it does seem like even a lot to me, anderson. 52 times in that amount of years. >> meaning that? >> i tell you, i worked in harlem for probably four years and another black neighborhood for about four years. i don't think i ever pulled the same person over, maybe twice. that's it. >> so this, what, raises questions to you about the police or -- >> i don't know how to look at it. it definitely looks suspicious. maybe the police knew him and knew him as somebody who always drives without a license and they were looking to, you know, get their quota at the end of the month and figured i see him, let's pull him over because i know his license is suspended. i don't know. but 52 times sounds a little excessive to me. you know, i don't know if this was a black neighborhood he would get stopped or always in a

white neighborhood he would get stopped in. i'm not so sure of that. but it does seem to be a little excessive or a lot excessive to me. >> michael? >> absolutely. i congratulate brother houck for acknowledging that. it does seem excessive and plays into a pattern that other young people of color, especially black men, have been subjected to where their experiences are they are constantly being racially profiled. they are pulled over for one thing or another. something that might not arouse suspicion in somebody else and it could be in a neighborhood, especially in a suburban neighborhood where black men in late model cars or driving while black is a phenomenon that doesn't exist merely in mythology. it exists in reality. there's empirical proof to substantiate the claim black people are subjected to this time and again. it seems in this case the excessive numbers of stops certainly would indicate the presence of racial profiling. >> i agree, there might be some officers that actually do that. i don't think the majority of police officers racially profile.

nobody who i worked with, and i worked in harlem back in the early '80s when it was really, really bad, and i never knew anybody to say let's just pull that guy over because he's a black guy. although most of the people were driving. most the people i gave tickets to were white. >> you know what, you don't have to have an intention. that's the ugly beauty of racial profiling. you don't have to say hey, let's do it. it's an instinct. it's a hunch. it's an unconscious reflex that gets concreteized in notable behavior. because this person looks more suspicious than that person. all of that accumulates to end in racial profiling. >> in the last hour, you raised a point i wanted to pursue with harry here as well. you were saying that when you look at a lot of these instances, it's white male police officers with an african-american suspect as opposed to -- >> police involved shootings. >> police involved shootings, as opposed to a female police officer, latino police officer. >> or black police officer.

>> or black police officer. you believe what, that shows -- >> i'm saying that there are other alternatives than shooting a person. i'm saying why is it that these people, black police officers, latino police officers and predominantly female officers, don't end up involved in most police involved shootings? that means they know how to deescalate, they know how to use alternative strategies to keep this person in check and as a result of that, there is far less death. >> you're not facing a man with a gun. you're not facing a man with a knife. i have to disagree with you. you're not facing a man with a knife and not facing a man with a gun. deescalation is a great word and it's great if you can do it. i can tell you from my perspective and police officers that i know, there are some people you cannot deescalate. >> i don't doubt that. i'm just saying statistics show that overwhelmingly, white men are the ones involved in police involved shootings of black men. >> well, because there are so many white police officers. that's basically the problem. >> there are so many women, so

many latinos -- >> we have a diverse police department. >> i understand. what i'm saying to you is that there are great numbers of women and african-american and latino police people who are involved in conflagrations with black people and poor people and brown people and they don't end up dead. they more often end up dead at the hands of white police people. >> we don't know what situations they were in. >> i'm looking -- >> if we look at 1,000 situations, you would be able to say that. you haven't done that. >> what i'm saying, you are missing the point and distracting us. i'm saying the point is this. if those women and those african-american and latino police people are engaging with these people, why is it that the overwhelming majority of people who end up killing these people are white men and not the other police people who engage? >> we got to leave it there. interesting report out of harvard today that we will try to do something on tomorrow about other forms of

interactions between police and african-americans. it's probably the most comprehensive study we have seen so far. there's not a lot of data in a lot of these cases. we'll look at that tomorrow. up next, donald trump returns to the campaign trail for the first time since the dallas shootings. lot of attention on who is going to be his running mate. he said he's likely to announce it probably this week before the convention. we will talk about it next. ie to severe plaque psoriasis, isn't it time to let the real you shine through? introducing otezla (apremilast). otezla is not an injection or a cream. it's a pill that treats plaque psoriasis differently. with otezla, 75% clearer skin is achievable after just 4 months, with reduced redness, thickness, and scaliness of plaques. and the otezla prescribing information has no requirement for routine lab monitoring. don't take otezla if you are allergic to any of its ingredients. otezla may increase the risk of depression. tell your doctor if you have a history of depression or suicidal thoughts,

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welcome back. our breaking news continues to be two-fold tonight. as you see on the screen, street protests in atlanta, chicago, sacramento against police shootings and vigils in dallas and elsewhere for the five police officers killed at a protest. today in virginia beach, donald trump called himself the law and order candidate, had his first rally since the dallas killings and speculation grew about his choice of a running mate. gary tuchman asked trump supporters about it today. >> reporter: about 250 people, mostly veterans and family members of veterans. the audience for another republican vice presidential audition. this one in virginia. a chris christie audition. >> we fought for it.

we stood up and we took our country back. >> reporter: john presto is a navy veteran. who would you like to see trump pick as his running mate? >> chris christie is one. giuliani is number two. >> reporter: a wide variety of thoughts. sheryl hargrove served in the coast guard. if he asked you i want you to pick my running mate, you have to do it right now, who would you pick? >> i wanted condoleezza rice but she doesn't want to do it. >> reporter: among people believed to be on the short list, this marine corps vet spoke for quite a few here. >> i gave that a little bit of thought. my vote would be going toward gingrich, newt gingrich. >> i kind of like newt. i think he has the knowledge. he is good with media and -- >> chris christie was here today speaking. he's good with media, too, right? >> he's good with media. chris christie would be an excellent choice. i would also like to see him as attorney general. >> reporter: when christie was

finished speaking, trump took the stage talking about veterans' issues. but has this comment from last week worked against him with this crowd? >> saddam hussein was a bad guy, right? he was a bad guy. really bad guy. but you know what he did well? he killed terrorists. he did that so good, they didn't read him the rights. they didn't talk. they were a terrorist, it was over. >> reporter: ronnie grimsteed comes from a military family. because of saddam hussein there are more than 6,300 americans who died in two wars in the '90s and after 2003. for trump to say anything positive in any way about saddam hussein offends a lot of people. >> reporter: are you offended by it? >> no. no. he's referring to wars we haven't have been in to begin with. >> reporter: does it bother you in memory of colleagues that have been killed, that trump says anything complimentary about saddam hussein? >> no. it's not bothering me. what bothers me is some of the things hillary clinton says, okay? what she has to say about

benghazi. >> reporter: what about the time donald trump said senator john mccain was not a war hero? >> i like people that weren't captured, okay? i hate to tell you. >> reporter: jack mcwaters is the former virginia state senator. does that quote bother you? >> yeah, probably did a little bit. >> reporter: you think he should apologize for it? >> i think we should get on. the primary's over. we got a big election. the republican party will get together. all politicians bump each other. all politicians do that. >> gary joins us from virginia beach. christie was u.s. attorney obviously prior to becoming governor. not a big surprise to hear one of the women say she would like to see him as attorney general. did other trump supporters say they prefer him as attorney general as well? >> reporter: the answer is yes. this wasn't a huge mega-rally. it was an invited guest list. we were able to talk to a large percentage of the 250 people who were there afterwards. people like chris christie who were there today. but most of the people who talked to us like him better in

the role of attorney general than vice president of the united states. what was so unusual about this eecht tod event today is christie and trump were never onstage at the same time. they were never together. it's dangerous to read political tea leaves when it comes to picking a vice presidential candidates. presidential candidates like surprises. we saw it in 2008 with sarah palin, in '88 with dan quayle. if john mccain and george h.w. bush can surprise us, a guy like donald trump can surprise us, too. >> gary, thanks. joining the conversation, cnn political analyst and "new york times" political correspondent, patrick healey. donald trump all along has said in terms of a vice president pick, i remember asking him this months and months ago, he wants to go for somebody political, not necessarily military because he feels pretty confident on the military side or the economic side, he's a businessman. he wants to go with somebody who can help him out on capitol hill. who do you think it will be? >> yeah. that plays to gingrich's strengths. my reporting has found that chris christie's star has sort of faded in the vp side, that

trump would like to give him a senior role in the administration but he's looking less at christie and more at gingrich and pence. i think the question is, does he go conventional which would be more like mike pence, or does he go with someone who is like him, kind of an unconventional choice, someone whose temperament and background may be a little rocky with parts of the party, but who would give him, newt gingrich knows washington, he knows how congress works. he knows he has some of those relationships. he will be very good on the debate stage in the fall which is what they want against hillary clinton's running mate. the reality is that if you look back at vp picks, when george w. bush picked dick cheney, there was chemistry there. there was likability there. barack obama picking joe biden. bill clinton picking al gore. there was a connection there like what donald trump has with newt gingrich, for instance.

he doesn't know pence as well. when you have people like john mccain picking sarah palin, john kerry sort of picking john edwards which is a little bit more of a superficial choice, those haven't worked out as well. >> cory, i'm not going to put you on the spot. actually, i will put you on the spot. who do you think it should be? >> what i think is a lot to what patrick alluded to, is getting mr. trump's agenda done in washington. that's the most important thing. >> someone who knows capitol hill? >> or someone who has the relationships in place. but before you get to washington, obviously you have to win the election. what you have to look at is can chris christie help donald trump raise money, will he be that person who will support donald trump when the attacks come, much more so than mike pence would be. i think what you have seen in this election cycle is chris christie was an early endorser of donald trump, has been a steadfast supporter of donald trump. when push came to shove at the end of the election 17 weeks from tomorrow, christie will be the person standing next to donald trump making sure that his philosophy, his process, his desire to go directly at hillary

clinton would be put forth by chris christie much more so than mike pence would do it. >> really. you think christie has a better shot than mike pence? >> i would not say that chris christie's star has fallen. he's been very loyal to mr. trump. mr. trump rewards loyalty. and they have had a long-term relationship. they have been friends for 10 or 11 years, much more so than governor pence. >> and newt gingrich. >> and newt gingrich. trump has a personal relationship with chris christie and his wife, mary pat, that extends long outside the political world. don't discount him just yet. >> one of the red flags seems to be that chris christie is even less popular in new jersey than mr. trump is. in terms of where does chris christie help you, you could say he would help you, you know, as attorney general or maybe as chief of staff more than vp. >> also, there was some concern about i think trump told the "washington post" he's leaning towards picking somebody who helps unite the republican party. >> that's not chris christie and

i'm from new jersey. you're right. chris christie's popularity there is at a historic low for him. he doesn't really bring much to the ticket because trump is already an attack dog so you don't really need another one like that, where the two of them can kind of go over the top. you need a little balance. at least newt gingrich, he's an attack dog also but he does it in a way that's very academic. so for people who like newt gingrich and his sometimtyle an fact he was speaker of the house, that would fit the bill of someone that conservatives would find him acceptable, he knows washington, and he's obviously been lobbying for the job very loyally for a long time for donald trump. there is chemistry there. out of this group, i have always been of the thought process that he should bring in a general on board and when i saw the reports of michael flynn i thought maybe i was right. >> obviously -- >> it's problematic now. >> just in terms of somebody who has experience debating on a presidential level, both gingrich and christie fit that bill as opposed to mike pence. >> yeah. very true.

and obviously, these debates i believe are going to be critical and really show off the excellence of the democratic ticket of senator clinton -- secretary clinton and whoever she picks to be vp. but to talk about chris christie for one more second, i think if donald trump picks chris christie, it really makes clear that the idea of somebody who says they're one thing and becomes another thing is front and center for donald trump. because chris christie ran for governor of new jersey as a really moderate republican with a lot of views that a lot of us in the democratic party might have supported. then he came into office and as things got more political, as he started ridiculously thinking about running for president of the united states while bridgegate was hanging over his head, he became much more conservative. so it's just an example like donald trump, this, that, the other, flip-flop. >> i think corey's point about loyalty is really interesting. people who somebody has a relationship with him. >> trump doesn't need conservatives. he needs to cross over. he already said he don't care about unity.

>> i want to go back to dallas. an aspect of it that caught so much attention. how a robot armed with a bomb ended the standoff with the sniper. ♪ ♪ you recommend synthetic and can yover cedar?to me why "super food"? is that a real thing? it's a great school, but is it the right the one for her? is this really any better than the one you got last year? if we consolidate suppliers what's the savings there? so should we go with the 467 horsepower? or is a 423 enough? good question. you ask a lot of good questions... i think we should move you into our new fund. ok. sure. but are you asking enough about how your wealth is managed?

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how it went down. >> reporter: a robot and a pound of c-4. this is what dallas police use in an unprecedented move to save officers' lives. in the heat of battle, the dallas police used the extraordinary tactic likely the first in america, a robot with a bomb to kill a cop-killing sniper. >> we knew through negotiation this was the suspect because he was asking how many did i get? he was telling us how many more he wanted to kill. >> reporter: he had already killed five officers. wounded seven and two civilians during a 45-minute gun battle. >> slow down. he's in the damn building right there. don't know where he's at? he's in that building. >> reporter: chief brown made the final call. after a two-hour negotiation. he told his s.w.a.t. team to come up with a creative plan that would keep officers out of the line of fire and take out the suspect. >> they improvised this whole idea in about 15, 20 minutes.

extraordinary. >> reporter: that plan involved this kind of robot secured with c-4 explosive. >> so that right there is a pound of c-4? >> yeah, this is 454 grams of c-4. >> reporter: we asked explosives expert to help show us. officer had to maneuver the robot to a second floor. this is a similar model. notice the arm extension. that would have held the c-4 explosive in place. police then had to get it close without the suspect knowing it was there. it was positioned behind a brick wall. >> this 2 x 4 right here is going to simulate the arm of a robot. this c-4 will be attached to this arm directly against the wall right here. >> reporter: we set up strategically placed cameras and built a brick wall with rebar inside to demonstrate the blast range. to give you some idea of just how powerful a pound of c-4 can be, we're standing more than a football field away from that wall and when it explodes, those

fragments could be dangerous to the human body, even here. that is outside. inside a building, barnett says the damage to the human body would be exponentially worse. >> in a closed environment, yes, a pound of c-4 is a lot. >> fire in the hole. in three, two, one. >> reporter: so it wouldn't necessarily be the blast that killed the person, but the fragments that killed the person. >> that's right. yeah. the wall becomes the lethal aspect of it. >> reporter: would go right through you basically. >> absolutely, like butter. >> that was sara sidner reporting. we'll be right back. (guy) oh man, the show's

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that's it for us. thanks for watching. time now for "cnn tonight" with don lemon. this is cnn breaking news. >> breaking news, new protests and a vigil for fallen officers. that on the eve of president barack obama's trip to dallas. this is "cnn tonight." i'm don lemon. demonstrators are taking to the streets tonight after a week of shocking violence. see live pictures of atlanta right now. and meanwhile, in dallas, a vigil for officers killed in last week's attack as a family of gunman micah xavier johnson struggles to understand the unthin