this is "nightline." >> tonight, black and blue. with tensions run go high between police officers and black communities. >> hey, what the heck? i haven't seen you in forever. >> these cops are caught between two worlds. >> i can describe being a black young cop. it's like unicorn. >> a look at what they face. >> i'm always going to be black but i'm only blue as long as i continue to wear the uniform. >> plus, businesses fighting with grizzlies to get their items certified as bear resistant. how they withstand the bite. and the art of the dull.

>> america has been a nation defined by its people. >> but this has twitter going wild.

good evening. thank you for joining us. we're on the streets with two

black police officers who are bridging the divide between their communities. what they have to say about wearing the badge in the age of black lives matter and blue lives matter. my "nightline" co-anchor is on the story. >> this is my own neighborhood. >> when she walks these familiar streets, it's like she never left. >> you literally know everybody. >> i used to walk the beat. >> as she strolls through this san francisco neighborhood where many view police as a foe, most everyone sees her as a friend. >> don't get scared. >> across the country in pittsburgh, it is the same for officer andre wright. they used to call the former college athlete dre the athlete. now he's he dre the cop. but not much has changed. >> they're my people. it is what it is. >> at a time when tensions between police and black

communities are explosively high, the divide between americans can feel irreparably deep. caught in the middle of a precarious balance. as one officer put it too, black for the badge too, blue for the hood. in our series, collaboration with the partners of the undefeated. >> there's a blue lives matter and a black lives matter in this country. >> where do you fall in that? >> well, you know, i have told people that i am always going to be black. but i'm only blue as long as i continue to wear the uniform. >> she joined the force nearly 30 years ago as part of the justice department's push for diversity in sfpd's ranks. she was an unlikely candidate then. >> i was complaining with the blat an drug deals. i complained about the police cars that just drove by the area like they didn't even exist.

>> these police officers said stop complaining. get in the game. >> right. >> so you became an officer. yes, against my better judgment, i became a police officer. i mean, the police officers in my concept, they're so manly. >> back in her early days, walking the beat chronicled by kgo, she was hopeful. idealistic. >> i feel like this is my ultimate calling and i love it. i thought just one big happy family until 2015. i found out that there were some who just didn't feel the same connection. >> two years ago, one of her colleagues had been convicted of fraud. during his appeal, investigators stumbled upon racist and sexists texts between him and other cops. shock goly they singled out one sergeant-year-old andy a williams. >> i said get out of here. >> you didn't want to believe it. >> i didn't want to believe it.

>> so what messages stick out in your mind? i was someone's black -- >> it refers to them as savages and animals. an undeniable police bias and discrimination. >> justice should occur in this situation. >> in january, 2016, she toefd a blue ribbon panel there was bias in the ranks. rather than defend yolanda, they rebuked her writing in a public letter that her testimony was largely self-centered and grossly unfair. soon after, she left the police union. the union responded by saying, we are certain that the vast majority of our members, including officers of color, do not agree with her either. we are committed to diversity in our ranks. but the department of justice had been investigating sfpd and in october 2016, it strongly recommended nearly 300

institutional changes, identifying implicit and institutionalized bias against minority groups. that fall she was promoted along with 18 other black officers. these days, lieutenant yolanda williams is the president of another union. >> there is no time to sit back and bask in the sun and say we made our accomplishments and we're good. >> she identifies with the trust and even fear many have toward the police. >> when you're not in uniform and you see blue lights behind you, you get pulled over. >> my heart stops and i all of a sudden find myself in a situation of, what did i do? keep my hands at the steering wheel. don't move. >> i don't have that reaction when i get pulled over by a police officer. >> you don't? >> huh-uh. >> wow. >> doesn't that tell you something about where we are? >> something wrong.

majorly wrong. historically, the policing institution arose from out of slave catchers. so he that is the foundation of the institution alibi as that's exist within the police department. >> a black young cop, it's like the uniform. >> for officer andre wright, with just five years on the force, the problem isn't the system. >> i don't agree with institution alibi as, per se. i believe there are so many individual personalities, when it comes down to being a human and cops are human. >> he said the best way to right the wrongs is with officers like him. >> i'm supposed to be in the neighborhood but i have such a personality, i guess, they allowed me to deal with certain incidents and certain things across the city. >> he comes from a troubled past. >> i've seen people shot. i've had a gun pulled on me.

there's a lot of bloodshed, a lot of guys who didn't make it. a lot of the guys i grew up with didn't make it. it's sad. even people my age, they're like, you were crazy in high school so it gives me hopeful. >> his current job is a bit undefined. like yolanda, you can find him at a football game, at the park, walking the streets. anywhere he gets to interact with people. >> i ride around and i basically got anybody that needs some help or, i believe i can insert myself into a position in life, i try to. >> like an ambassador? >> i would say just a good cop. >> a former college football star at pitt. he stumbled into a police internship. he remembers helping a woman recover a wallet. >> she was very grateful for what we had done. i like this.

i can do this. >> like san francisco and 69 others in the past 20 years, the spurring police was also investigated by the justice department in 1997. in spurring, thpittsburgh, theyb racially insensitive language against african-americans. >> i recall the old days. >> but rather than blaming the system, he challenges others to be part of system. >> i don't see anyone i know. i don't see a cop that i recognized. why would you not become an officer? >> he does whatever he can to keep things from escalating. there's not much that you can say to me that i haven't experienced. >> 40-year-old female, threatening suicide -- >> so this is a suicidal female.

so we're at the site. she's threatening suicide. we'll check it out. she was depressed about her boyfriend leaving. she wasn't trying to hurt herself. my job is 85% social work and probably the rest, 15% police work. >> and lots of charm. >> thank you for everything you did, for making our streets safe. >> like more than 70% of officers, he's never had to use his weapon on duty and he wants to keep that it way. >> we have nightmares, having to shoot somebody. it's scary. >> that fear is something he wishes his community understood. we get afraid. as many times as you make a mistake, my mistake will cost a life or my job. >> with tensions high, both are pleading for mutual understanding.

>> how do you explain blue lives matter to the rest of the world? >> it's not to say that police officers matter anymore. all we're asking for is for you to be a little bit respectful for the fact that we're putting our lives on the line. >> it's nice to meet you. >> respect and compassion, an ethos they both share. >> to have the servant's attitude. if you can't be a servant, this is not the correct career for you. >> i'll give him a little update. you just fill him in. >> all right. thank you. >> life is short. i make a difference in somebody's life. even if i affect one person in my whole life, i'm all right with that. i'll rest in peace. >> for "nightline." >> our story tonight was done in collaboration with our friends at espn and the undefeated.

to learn more about these officers and others featured in their special report, please go to the coming up next, a bear fight. the life and death reason behind the match-up. had a lot on my m. my 30-year marriage... ...my 3-month old business... plus...what if this happened again? i was given warfarin in the hospital, but wondered, was this the best treatment for me? so i made a point to talk to my doctor. he told me about eliquis. eliquis treats dvt and pe blood clots and reduces the risk of them happening again. not only does eliquis treat dvt and pe blood clots. eliquis also had significantly less major bleeding than the standard treatment. eliquis had both... ...and that turned around my thinking. don't stop eliquis unless your doctor tells you to. eliquis can cause serious and in rare cases fatal bleeding. don't take eliquis if you have an artificial heart valve or abnormal bleeding. if you had a spinal injection while on eliquis

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the bears are boss. breaking into these products their singular goal. >> it is not just play, it's their day job. >> she got into and it started tearing apart on the styrofoam. >> these grizzlies are vets, he is thing these products. >> the mama bear and her two cubs are looking for food. >> bears getting too close for comfort happens too often. the lure of an easy meal tempting them out of the wild and into neighborhoods. sometimes even breaking into houses like the one in colorado. >> but here at the grizzly and wolf discovery center, that curiosity and fight becomes an asset. the bite force of a grizzly, 1,200 pounds per square inch, is nearly eight times that of a human. in yellowstone they can reach seven hundred pounds. and some places in canada, up to

1,700. bill michaels has been in the business 30 years and he's come to put his product to the test. >> if you allow bears to get into trash cans, they keep coming back. it's an easy meal. >> a new refuse container, the kodiak can. >> made all the materials ourselves. designed it. >> how much have you had to change the product to become bear safe? >> this is the third generation. >> years of work, roughly $250,000 in producing costs are on the line. >> some dry dog kibble. to entice the dogs to the can, he fills the kodiak with temptation. >> some huckleberry jam. >> the breakfast of champions. >> lots of locks. quite often the bears will drag products in the pond. that's why we're doing it. so it does not go into the pond.

we're ready. >> and let the grizzlies have at it a. >> he is use go his claws. look at those claws. >> they have so much power in those claws. they can rip right through plastic. >> that bear is 350 pounds. the container? >> 42 pounds. >> to get the all important bear resistant certificate, a product must withstand 60 minutes of bear he contact. >> that's the rule. 60 minutes. >> if you pass -- >> you're done. and you get a certificate. >> and your product on the market. >> that's right. round one. halfway there. >> it's holding up but it's still early. it ain't over until it's over. >> grizzly bears are truly opportunistic omnivores. >> the man who knows more than most. a leading bear scientist devoted

to these majestic animals for nearly 30 years. >> you've said we might encounter what? >> a bison on the road. this guy does not look worried to see us. he is coming straight for us. look at him. that was amazing. >> here, the grizzlies' natural habitat. just outside modern day development. >> so you have the park over here. and then you can hear. there's a semi truck just barreling down the road. >> area has changed a little bit. >> warmed bear spray -- is it your responsibility? >> yes. most people don't want to see bears die because of bears getting into garbage. it only takes one mouse doesn't have a bear-proof garbage system and that's all it takes. >> back at the central, he is getting toward he is the five coolers. >> it doesn't seem that long. >> two years of work went into this today.

>> this is the end of the road to make sure we've done our home boring. >> i think this one will pass. >> spirit the bear has other ideas. >> oh, boy. here we go. >> he can rip the top off. >> teeth and claws right through the cooler. >> you never want to see that. this is why we're doing it. it shows us where we need to make corrections. >> inside, the cooler wasn't the only target. >> here's what remains of our go pro. it is still filming. this has been inside the bear's mouth. she was able to people it right up. she didn't even have to bust through the second layer. >> i think i'll stop guessing on whether products will pass or fail. now it's clean up time. >> how does this help their brothers in the wild? >> if there is the cooler at the camping site and the bear doesn't get in, he'll continue

down stream or into back country where they normally live. >> you believe that will help the bears in the wild. it will cut down on the interaction. >> very much so. and keep people's safe. >> the bear is just shy of 60 minutes. >> he is doing one of his moves. >> what will it mean when that clock strikes 60 minutes and you're good? >> the anxiety will be over. >> later that day, it passes. >> it saves bears and humans as well. >> for "nightline" in west yellowstone, montana. next, he's making animatronics great again. but can he tweet?

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