i want you just to remember that. >> reporter: a message that reaches far beyond navajo nation. >> we need to recognize that these are real people with families, with children, with spouses, with mom, dad, we need to teach our children to respect and honor law enforcement while they are young so when they grow up and they see a police officer, they will be thankful that somebody is there protecting them. >> reporter: boris sanchez, cnn, window rock, arizona. >>> continuing on, you're watching cnn. i'm brooke baldwin. thank you for being with me.

nation by then he is friends with judy collins but then goes to the navajo nation. and then helps them file papers. and he lives there working with those folks for a few years than tragically of the navajo reservation talks about who he was. >> that you heard that song? they were friends then colorado. >> the began you leave these two histories but they are both in speaking to each other alternately so how do decide that relative make sure of the narratives? >> ultimately the book is about the people. with the of record of what took place but those testimonies were always critical. in a few minutes we will take questions but this is important. i want to share a story. but myself with the soccer research assistance we've met a man named pedro. he says when you get here you'll find me right here. come find me. o k. so we show up we walk through the doors to say hold on. i will make a phone call. and say he no longer works for us. so we tell the story where does he live? >>. >> the cultural center is adjacent to the library. and then to say hold on the second to say i

. >>> police officers in navajo nation face a unique risk. they have to patrol the immense native american nation. now an officer killed last month is remembered for his bravery. cnn has nor this week's "beyond the call of duty." >> reporter: this stunning desert panorama in the southwestern united states is the largest native american reservation in the country. spread across three states, the vastness and remoteness of the navajo nation reservation makes it incredibly challenging, even dangerous, for law enforcement. a territory larger than the size of west virginia, patrolled by a police force with a fraction of the resources and officers of its bordering counties. >> probably working with half the staff to other police departments, what they work with, and twice the area. so the struggles out there and the hurdles they have to go through is immense, but they still go out and and do it every day despite the danger and not having backup close by. >> reporter: last month one of their officers was the only officer responding to a domestic cal

and in the navajo nation in arizona, it's making a difference. pbs special correspondent lisa stark, of our partner "education week," brings us this story as part of our weekly segment, "making the grade." >> reporter: this is a one-of-a- kind classroom, with a one-of-a- kind educator, clyde mcbride. >> my philosophy is, kids don't learn unless they get a little dirty. >> reporter: so in clyde mcbride's classes in navajo nation, in northeastern arizona, students jump right in. >> the mcbrides tell us, go in there. you're not going to learn anything if you stand back and watch. >> reporter: this is hands-on instruction in veterinary science-- part classroom, part vet clinic. students work and observe in two operating rooms, one for small animals, the other for large. they conduct exams and vaccinations, in a state-of-the- art $2.4 million facility, part of monument valley high school in kayenta arizona, and its career and technical education program. 180 students, more than one quarter of the high school, have signed up for this program, where abs

and, a teacher in the navajo nation schools takes a very hands-on approach to learning. >> in a math class, you get the problem wrong, you miss that question. in my program, if you get that math problem wrong, that animal can die. >> woodruff:

. >> reporter: a message that reaches far beyond navajo nation. >> we need to recognize that these are real people with families, with children, with spouses, with mom, dad, we need to teach our children to respect and honor law enforcement while they are young so when they grow up and they see a police officer, they will be thankful that somebody is there protecting them. >> reporter: boris sanchez, cnn, window rock, arizona. >>> continuing on, you're watching cnn. i'm brooke baldwin. thank you for being with me. we'll begin with north korea. they talk about a merciless retaliation that would leave no survivors. this comes amid when kim jong-un could mark a holiday with a nuclear test. if he does, there's a chance that vice president mike pence could be just across the border. the vice president is scheduled to arrive in seoul, south korea, on sunday. a north korean test would be the first one on president trump's watch and the president has already said on twitter that north korea must be dealt with and if china doesn't do it, the u.s. with its allies with. cnn's jessica schneider is

amy: tom, where were you born and what nation are you with? om: i am navajo. my mother is navajo. my father, they say he was dakota. i have embraced both cultures. amy: and finally the significance of this march -- right.at's and my son right now, dallas -- amy: dallas, are you trying to interrupt this interview? >> we have another meeting. .my: you guys look alike >> i look older. [laughter] >> that's what i will look like in 15, 20 years. handsome, stunning. our brothers from alaska, where the ice is literally melting. he cannot deny the reality. his environment is melting right now. -- thank youe is so much, goldteeth! in theall you goldteeth, plural? [laughter] i am from alaska. we have seen the ice that is not there, not present. we do not have descriptions in our language, which is thousands of years old. i'm not sure what we can say to suit the nature of thiss climate catastrophe. the arctic is compromised, and we have no real recourse we can follow or see in our culture that shows we are on the right trajectory. because we cannot hunt, we cannot fish, we cannot see the thi