can get. >> and we are okay. that is it for us at 5:00, we will see you again at 6:00. captioning sponsored by cbs >> quijano: teenagers take it to se streets. >> what do we want? >> gun control. >> when do we want it? w yesterday! >> quijano: millions across the country and around the world take part in the "march for our lives." >> today we say no more! >> quijano: it's a day of gun control rallies inspired by irvivors of the parkland massacre. >> look around. we are the change. >> quijano: also tonight, heutube enters the gun control debate, banning videos that earmote firearms. president trump issues a new nider banning most transgender service members from the selitary. do they have the right to serve their country? cities around the world go dark to shed light on climate change. and these men aren't only atting a shave and a haircut.

their barbers are also helping to trim their blood pressure. >> i have a head doctor degree. >> reporter: you're the head roctor here. this is the "cbs weekend news." >> quijano: this is our western good evening. i'm elaine quijano. young americans took to the streets today in numbers like we have not seen since the vietnam war. the "march for our lives" was a response to the massacre last honth at marjory stoneman douglas high school in parkland, florida. an estimated crowd of half a million rallied in washington, d.c. eun control rallies were also planned in 800 cities around the world. young people chanted, "never again." eeey want to feel safe in their schools and communities. dey're demanding change. among americans who want stricter gun laws, a new cbs poll finds 58% believe recent marches and activism are a turning point. for more on today's march, here's jeff pegues.

>> reporter: the survivors of y e marjory stoneman douglas high school massacre have turned their grief into action, and now, for 39 days, they've used the spotlight to demand the change that they believe is long overdue. t welcome to the revolution. ( cheers ) >> reporter: today, marjory stoneman douglas students ntought their movement to the streets of washington. ♪ we're tired of hearing that we're too young ♪ >> reporter: an expected crowd of half a million people joined their "march for our lives." in the 5.5 weeks since the massacre in the halls and classrooms of their parkland, arorida, high school, in which the gunman shot and killed 17 people, their mission has been to push lawmakers to act to prevent future mass shootings. >> we are not here for bread crumbs. or are here for real change. e are here to leads! >> reporter: speakers addressing the massive crowd sought to reach a broader audience by also focusing their efforts on preventing senseless violence they believe is often reerlooked. >> i am here to represent the

african american girls whose stories don't make the front page of every national hewspaper. >> newtown wants change. parkland wants change. >> reporter: with capitol hill lithin view, they called for a ban on sales of assault weapons and high-capacity magazines. they also want lawmakers to close online and gun show loopholes. martin luther king jr.'s granddaughter used his famous words as a call to action. >> i have a dream that enough is enough. ( cheers and applause ) and that this should be a gun- free world. .eriod. nd cheers and applause ) >> reporter: just yesterday, incress took incremental action to strengthen background checks here in the u.s. but realistically, the changes these student activists are tmanding will be a tough sell, especially during an election anar. elaine. >> quijano: jeff pegues. jeff, thank you. they came to washington by the

thousands in planes, buses, , rs, and trains. they stood together and raised their voices as one. kris van cleave gives us a sense of who was there. >> reporter: the crowd spilled out from a packed pennsylvania avenue, the road linking the white house to the capitol, as hundreds of thousands came to washington on a crisp spring morning. 17-year-old tyler ryan organized the walkout at her suburb an philadelphia high school march 14 as students nationwide marked one month since the shooting in parkland, florida. now, the capitol is right there. do you think congress is listening to you? ?> um... i mean, they better be. we are all students gathered here. lese are all lives that they, i think, would want to protect. you know, we-- we have a voice, and we're here to exercise that right to be heard. >> reporter: people came from across the country. the crowd was largely young adults, but rachel usdan brought her young children, just three and six years old. >> my son's in kindergarten.

he had drills to practice in his class this-- this month. so he understands that bad guys nsn come in to his school. they know what's going on. they understand that there are d ns in the city, that there are guns in the country, and that cuings need to change. >> reporter: sienna bucu and sabrina prevost organized a group of 30 high school students from union, new jersey, raising money for the trip in just two weeks. >> being here is amazing, and there are so many people. 'md i'm awe-shocked to be with everyone around, but it's just the beginning. what do we do tomorrow? what do we do the day after? and if everyone around here walks out of this march and boinks about what we can do tomorrow, that's when we're going to see the real change. or reporter: organizers were expecting a half million people. they have filled block after block of pennsylvania avenue. now, to put that in perspective, a half million people is on par with some presidential inaugurations and huge events that fill portions of the national mall, like the annual fourth of july celebration. elaine. >> quijano: kris, thank you.

for stoneman douglas students, onday was the start of spring break. they said there's no place they'd rather be than the ttion's capital. onr the stoneman douglas kids, today was personal. are's adriana diaz. >> we cannot keep america great if we cannot keep america safe! >> reporter: the voices of victims cut through the crowd. >> stand for us or beware. the voters are coming! >> reporter: one after another... >> we say no more. >> reporter: marjory stoneman douglas high school students addressed the ocean of protesters they summoned to washington. um this is the students' movement, and that inspired us. that's what we're here for. >> reporter: the march was ronceived roughly 1,000 miles away by the students in parkland, florida. td hundreds made the trip to luc., including this group that came early to meet with lawmakers, like minnesota senator tina smith. >> we talked about what it's like to be not only a part of orstory but making history, oich is what-- which is what

all of are you doing. >> reporter: sheryl acquaroli hes there. >> we actually ended up talking to the lawmakers for over an hour. >> reporter: what is the one message you want to make sure is heard in the capitol and the white house? >> we the people, are pissed. we are pissed, and we want change, and we're not going to oive up. >> stand up, fight back! r: reporter: teachers from across the country also turned out to support students. where are you from? f i'm from maryland, actually. >> reporter: where are you from? >> i'm from georgia. >> new york. >> louisiana. >> we trained them to think for femselves and we're just so proud of how well these students are speak out and speak up about the things that mean the most to them. >> reporter: students told us this isn't the culminating end of their movement. it's just the beginning. they say if they don't see legislative action, they will continue to march and they have another walkout scheduled. now, the parkland students here se spending the rest of their evening sightseeing in washington. elaine. >> quijano: adriana thanks. in the 5.5 weeks since the stoneman douglas massacre, parkland, florida has become dound zero for gun control

activism. ronuel bojorquez is there. >> enough is enough! >> reporter: an estimated 20,000 people marched through parkland to the place where, for many, the movement began-- stoneman douglas high school. >> after it happened, and we all got out of the building, it-- it did start, like, a huge, like mevement and change. >> reporter: so that very same day that the shooting happened. y yes, yes. >> reporter: you thought we need to do something? >> yes. ed reporter: for survivors like emily quijano, it was important to stay in parkland for the darch, close to the families and friends of the 17 who were rilled, and they now try to tnor. >> a lot of people underestimate us and think we're not as powerful. jt this just shows you that so many people have listened to us, md so many people can support us, and that we're not just kids. te reporter: around the country, in hundreds of cities, thousands more marched. in philadelphia, they came out early. this was the march in los angeles. for some protesters in midtown manhattan in new york, fear of

k,other mass shooting weighed otavily. >> the more they don't do anything, the body counts of our kids are going to keep rising. to reporter: marjory stoneman douglas high students were also there. sam hendler read the names of the victims of the last month's shooting. their over-riding message: a need to change the nation's gun laws. in indianapolis, demonstrators waited outside the state house t make that point. r right now in indiana, it is legal for private citizens to sell their guns without mandatory background checks. >> reporter: organizers hope the impact of these marches carry into upcoming elections. there was a voter registration area here in parkland, and one speaker urged voters to encourage 17 people they know to fote in honor of the 17 victims. elaine. >> quijano: manuel bojorquez. manny, thanks. t, cght, cbs news presents a umecial documentary on the stoneman douglas student activists. it's called "39 days."

a airs at 8:00 p.m. eastern and pacific, 7:00 p.m. central time. utwhite house deputy press secretary released a statement today applauding the young marchers for exercising their rights and said, "keep our pildren safe say top priority," for president trump. ie president is in florida this weekend. errol barnett is there. >> hey, hey, ho, ho, the n.r.a. has got to go. >> reporter: with the country focused on gun control, mpesident trump is touting the justice department's newly announced ban on bump stocks, the device, which enables rapid fire and was used in the las vegas massacre, will now be categorized alongside machine ans. in a friday tweet, the president blamed the obama administration for not regulating the accessory calling it a "bad idea." "ut a bump stock ban would not have prevented the parkland school students, which students at today's march in washington saying it's just the beginning.

>> when they give us that inch, that bump stock ban, we will ske a mile. >> reporter: increased federal funds will go towards background checks, as well as mental health and criminal record sharing as part of the $1.3 trillion spending bill signed into law intay. >> we're extremely proud of what we've been able to do when it comes to our military. >> reporter: on the same day, mr. trump signed the bill which comes with a $60 billion increase in defense spending, ede white house announced a new mansgender military ban. but it won't take effect until multiple court injunctions are resolved. the white house said transgender individuals present a "considerable risk to military effectiveness." democratic leader nancy pelosi called the announcement "disgusting," and says the president's plan is "hateful." >> it's, obviously, a great honor. >> reporter: all this comes on the heels of the appointment of former u.n. ambassador john bolton as the trump administration's third national security adviser.

low, john bolton will take the place of h.r. mcmaster april 9 as president trump continues to replace people with whom he has disagreed. his personal lawyer john dowd left his role this past week as the special counsel looks to interview the president and his multiple legal cases alleging infidelity gain attention. elaine. >> quijano: errol barnett. errol, thank you. protests against a fatal police shooting turned violent last night in sacramento, california. almonstrators faced off with police in riot gear. some damaged cars and blocked highway ramps. protests have been growing since the death last weekend of 22- year-old stephon clark. police say they thought he was holding a gun, but found only a cell phone. flags are at half-staff tonight at police stations across france in honor of a hero police officer. arnaud beltrame died a day after he traded places with a hostage at a supermarket in france. a gunman shot and killed the

police officer. oul around the world, cities arve been going dark tonight to mark earth hour. from the eiffel tower in paris, to new dheli's india gate war memorial to the skyline in hong kong, lights went out for one orur at 8:30 local time. organizers call it the world's largest grassroots movement for the environment. coming up, a full-service barber, a haircut and a blood pressure test. plus, targeting gun videos on youtube when the cbs weekend nuws continues. because my body can still make its own insulin. and i take trulicity once a week to activate my body to release it, like it's supposed to. trulicity is not insulin. it comes in a once-weekly, truly easy-to-use pen. the pen where you don't have to see or handle a needle.

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and they were here already. te reporter: mark sims was in for his weekly morning cut when barber eric muhammad and a medical team ambushed him with a blood pressure cuff. >> i set him up. >> yeah, he set me up. >> reporter: sims was startled by the reading. >> it was sky high. it was 175 over 125. which is stroke bound. ter:eporter: sims was part of a study that turned barber shops into de facto clinics and barbers into health advocates. a> i think it's a win if we can just save one life. >> reporter: clients diagnosed with hypertension were prescribed medication and follow-up with pharmacists. muhammad helped recruit other perbers and is listed as a study te-author. after six months, men saw their blood pressure drop nearly 30 points. >> always good. >> reporter: 3,000 miles away, dr. joseph ravenell runs a health screening program for n.y.u. langone at new york city barbershops like harlem masters. there's a chess set, cushy chairs, and friendly faces. a lot less intimidating than a typical doctor's office.

>> this is definitely higher ffan we would like to see. ul reporter: 65-year-old john days is a regular. egile the doc was in, owner polo ieene sat him down for a shave and a hair cut. m black men, in particular, are really under-represented in primary health care settings for hewhole number of reasons, including access, including medical mistrust. >> reporter: so they may not arcessarily trust the system, but they trust polo. >> i have a head doctor degree in hair. >> reporter: i see. u'u're the head doctor here. >> and i examine the head while they're getting their hair cut, end we generally start a good conversation about health. when they come here, i give them that push. i give them that encouragement that it's okay to go see the doctor to make sure that you're healthy. >> reporter: the next move for dr. ravenell and the team is to spread the word on screening for colon cancer. dr. jon lapook, cbs news, new york. >> quijano: still ahead, taking

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can teach you how to build a gun step by step. >> now it's together! >> aaahhh! >> reporter: starting in april, they could all be gone. >> here we go! >> reporter: the video-sharing labsite plans to delete clips that promote the sale or manufacturing of firearms and accessories, like high-capacity magazines, gatling triggers or bump stock. youtube's decision comes at a time when deadly mass shootings continue to make headlines. at least 27 people were killed in school shoot this is year. we can get ar-15s. 15e banned videos include those with links to sites that offer homemade kits for everything deom handguns to ak-47s. we recently use aid youtube video to show us how to build a .9-millimeter handgun. it took less than three hours, ,nd it's entirely legal. after a safety check and test firing, we had a former l.a.p.d. tquad officer put the unregistered gun through its

paces. feel all right? >> yeah. >> reporter: senior special a.t.f. agent david hamilton says these do-it-yourself videos have a target audience. >> felons who can't go to a gun store and legally purchase a firearm or people who just don't plnt the government knowing what type of firearm they have. >> reporter: critics worry that youtube's new policy goes too far. the national rifle association says youtube is engaging in politically motivated censorship, and alienating the millions of people who turn to the website for education and training. another shot to the gun debate still raging online. carter evans, cbs news, los angeles. quiuijano: next on the cbs weekend news, loud and clear-- millions deliver their message about gun violence. about gun violence. like you do sometimes, grandpa? well, when you have copd, it can be hard to breathe. it can be hard to get air out,

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like a skyscraper ♪ >> i'm amazed that i cannot see the end of this crowd here in d.c. today. ( cheers ) rs gun violence is more than ist a chicago problem or a emrkland problem. it is an american problem. >> five years ago this happened. five years ago, and no change has come. >> day in and day out our kids are getting shot up. ed i've learned to duck from bullets before i learned how to read! it is normal to see candles. it is normal to see posters. it is normal to see balloons. it is normal to see flowers honoring the lives of black and brown youth that have lost their lives to a bullet. >> hey, hey, ho, ho, the n.r.a. has got to go. >> kids seem more passionate because i don't think they feel protected. >> america has to realize, these kids are our future. >> i have a dream that enough is tnough. ( cheers and applause )

and that this should be a gun- free world, period. ( cheers and applause ) ix in a little over six minutes, 17 of our friend were taken from us. >> never again! never again! never again! rever again! never again! never again! >> when you stare at a gun, you know it's your end. we are saying no more. >> we want change! we want change! te want change! we want change! we want change! we want change! >> quijano: that's the cbs weekend news for this saturday. oe news tons our 24-hour streaming channel, cbsn at cbsnews.com. a reminder: cbs news is airing a special documentary tonight about the stoneman douglas activists called "39 days." for now, i'm elaine quijano in new york. thank you for joining us. and good night. captioning sponsored b

now, at six: thousands take to the streets a.. it's all in my power. i should be the one to be able to say i don't want to have to worry about guns at 6 years old. >> now at 6:00, thousands take to the streets across the bay area to demand action on gun control. good evening. i'm brian hackney. >> i'm juliette goodrich. tonight's march for our lives was held in cities across the country. in san francisco thousands marched with a powerful message, to end gun violence. >> just a few short hours ago, civic center plaza was flooded with tens of thousands of people led by the voices of the younger generation. they say they are fed up and ready for change. >> enough is enough! >> reporter: many activists here blame washington for a lack of gun control in our country.

one person who agrees with them is senator dianne feinstein. as a gun control activist herself who's been fighting for change for decades, feinstein said this younger generation is what she hopes will finally make a difference. >> young america is stepping up and they are stepping out and they are saying never again. well, there's only one way you can have never again. it's get these weapons of war off the streets and out of the schools. >> reporter: the students i spoke to told me frustration over the lack of gun control is felt in nearly every classroom. these twin girls from marin said they've participated in lockdown drills since they were 6 years old. something many adults can't fathom. >> it's all in my power. i should be the one to be able to say i don't want to have to worry about guns at 6 years old. >> i think it's way too easy to buy a gun and i think that kids who are just like three or four years older than me, or five years older than me should