captioning sponsored by cbs taylor harkin thousands demand gun control following the massacre at a florida high school. >> this isn't just a mental health issue! he wouldn't have harmed that many students why a knife! >> ninan: also tonight, russian officials call it a fantasy that they meddled in the u.s. election, but the u.s. national security adviser disagrees. >> the evidence is now really incontrovertible. >> ninan: at the olympics in south korea, u.s. figure skater nathan chen makes a remarkable comeback, and superstar lindsey vonn makes her debut. in southern mexico, a massive earthquake leaves millions without power. and overcoming his disabilities. a young man spreading good will

by transforming legos into art. >> super terrific happy time is what i like to call it. i just enjoy what i do. this is the "cbs weekend news." >> ninan: good evening. i'm reena ninan. the outrage and anger over the valentine's day massacre at a high school in florida is overflowing. 14 students and three faculty members were killed, and at a large and noisy rally today, several students from the school made sure their voices were heard. jericka duncan was there. >> we are going to be the last mass shooting. ( cheers and applause ) >> reporter: emma gonzalez joined a chorus of people at this antigun rally in fort lauderdale. >> we are going to change the law, and it's all going to be due to the tireless effort of the school board, the faculty members, the family members, and most importantly, the students, the students-- ( cheers and applause ) >> reporter: they're demanding a change to our nation's gun laws to stop people like the alleged shooter 19-year-old

nikolas cruz. do you think it will happen again? >> the fact that we personally are speak out this time, i just really hope it makes a difference. >> reporter: on friday, the f.b.i. admitted to receiving a tip last month from someone close to cruz who claimed cruz had spoken about committing a school shooting. >> the potential of the f.b.i. to miss something is always there. we do our best. we have protocols to prevent these things. we will be looking into where and how if something it's protocol broke down. >> reporter: cruz was no stranger to law enforcement. broward county sheriffs records reveal 20 calls for service during the past few years over disturbances involving cruz and his younger brother. the report obtained by cbs news, shows that on september 28, 2016, police were on the scene with a department of children and families to check on the health and well-being of nikolas cruz. the report said nicholas suffers from mental illness.

he has been cutting his arms, his mother said, to get attention. it goes on to say, "he has mentioned in the past that he would like to purchase a firearm." classmates say they were well aware that cruz was a danger. >> you didn't know this kid! okay. we did! this isn't just a mental health issue! he wouldn't have harmed that many students with a knife! how about we stop blaming the victims for something that was the shooter's fault? >> reporter: several students i spoke to said the rally is just the beginning. reena, next week, they plan to take their message to the state capitol in tallahassee. >> ninan: powerful messages. jericka, thank you. the principal of stoneman douglas, ty thompson, spoke out for the very first time since the tragedy, delivering an emotional message on social media. >> eagles, i promise you, i will hug each and every one of you as many times as you need, and i will hold you as long as you need me to for all 3300 of you, and your families, and we will

get through this together. >> reporter: thompson also thanked staff, students, and first responders. well, last night, president trump, and the first lady visited the florida hospital where several of the shooting victims are being treated. the president praised the doctors and nurses who treated the wounded saying they did an incredible job. the president also met with law enforcement officers who responded to wednesday's shooting. police say the suspected shooter, nikolas cruz, used a popular assault rifle, the ar-15. adriana diaz went to a gun shop near the parkland, florida, high school, and found out just how easy it is to actually buy one. >> reporter: this gun store is a mile from the school where a gunman killed 17 people with an ar-15. store owner moti adikay. >> let me give my condolences to all the victims and their families. >> reporter: but adika says the gun isn't the problem. >> if you're going to began ban this gun, this is going to prevent those law-abiding citizens from defending themselves. >> reporter: how quickly can i get one? >> you can fill this form out.

we run your information. if you are a law-abiding citizen, we can sell you that gun. >> reporter: how quickly will that process take. >> the process will take no more than 15 minutes. >> reporter: and i walk out with an ar-15. >> if you have a conceal license. >> reporter: nikolas cruz did not have a concealed carry license, so he had to wait five days before buying the gun legally at another story. ar-15s were used in six of the deadliest mass shootings in 2012. some parents want to eradicate the ar. >> there is absolutely zero need for the ar-15 rifle in this country. and i think our mental health system, we need help. >> reporter: registered republicans, glenn and angela goad, say the shooting at their 14-year-old daughter's school has changed their view on guns. >> i'm embarrassed as a father and as an american that it took this event to make me have emotion about this because the children of sandy hook were just

as important as the children in parkland. >> reporter: the couple told us that parents have been holding meetings to try to figure out how to bring about change. here at the main memorial in parkland, people have been coming all day to pay their respects. reena. >> ninan: adriana, thank you. well, special counsel robert mueller has charged more than a dozen russian nationals with trying to undermine confidence in u.s. democracy. these are the first criminal charges against russians. accused of secretly trying to disrupt 2016 presidential election. justice reporter paula reid has the latest. >> the russian conspirators want to promote discord in the united states. >> reporter: on friday, deputy attorney general rod rosenstein revealed new details about how the russians meddled in the 2016 election. >> the defendants posed as politically and socially active americans, advocating for and against particular candidates. >> reporter: prosecutors allege 12 russian nationals worked for a company called

internet research agency in this nondescript building in st. petersburg, russia. the company employed english speakers who posed as americans to stir up controversy on social media leading up to the election. the russian operatives were allegedly instructed to use any opportunity to criticize hillary and the rest, except sanders and trump. we support them. the operation was funded by yevgeny prigozhin, a close associate of president vladimir putin. russia's former ambassador to the u.s., sergei kislyak, dismissed the charges. >> whatever allegations are being mounted against us are simply fantasies that are being used for political reasons inside the united states. >> reporter: the indictment also alleges that some members of the trump campaign unwittingly shared some of the russian propaganda on social meade extra. but rosenstein emphasized that there are no allegations that any americans had knowledge of the operation. >> the nature of the scheme was that the defendants took

extraordinary steps to make it appear that they were ordinary american political activists. >> reporter: special counsel investigators say they've also uncovered new evidence against former trump campaign chairman paul manafort and could charge him with fraud, in addition to the dozen charges he's already facing. now, manafort's trial is not scheduled to begin until the fall, which suggests the special counsel's work will continue through this year and likely into next year as well. reena. >> ninan: paula reid in washington. thanks, paula. the flu outbreak is taking its toll again in the u.s. the centers for disease control reports 22 more children died this week, bringing the number of kids killed to 84. children aren't the only ones at risk. so are seniors. dr. jon lapook has more on that. >> reporter: it's wii bowling hour at cedar mountain commons in newington, connecticut, where flu is the common worry for the assisted living facility staff and residents. for 85-year-old peggy gorman, that means extra vigilance. >> if i see someone is coughing

or sneezing, i will automatically not sit near that person. >> reporter: she's even willing to cancel family visits. >> if they are sneezing or coughing, i say, "please don't come." >> reporter: protocols here call for frequent disinfecting of surfaces, door exwobz, even salt and pepper shakers, encouraging vaccinations, and isolating those with flu-like symptoms. and they're also teaching residents proper flu etiquette. >> palms of your hand, in between your fingers as well. >> reporter: nurse christine sampson is cedar mountain's wellness director. >> we actually tell them what to do-- wash your hands, cough in your sleeves, basic, simple stuff so they can remember. >> reporter: it's been an intense flu season but there's encouraging news in the latest c.d.c. report. the number of flu-related visits to doctors and emergency rooms is leveling off, about one in every 13 visits. the rate of death from influenza and pneumonia is down slightly. still, nearly 1 out of every 10 deaths in the u.s.

dr. daniel jernigan is the director of the c.d.c.'s influenza division. >> most of those deaths and most of the hospitalizations in the united states this year are likely to be in those over age 50, and so we're likely to see that stay high for a while, but it's encouraging to see it coming down. >> reporter: this year, the flu vaccine has been 36% effective overall. but among kids under nine, it's nearly 60% effective. so the c.d.c. continues to recommend a flu shot, especially since the flu season has not yet run its course. dr. jon lapook, cbs news, new york. >> ninan: now to the winter olympics in south korea. no miracle on the ice for the u.s. men's hockey team. the russians easily beat them 4-0. but in speed skating, a big win for the u.s. john henry krueger took silver in the men's 1,000-meter race. and in figure skating, a remarkable comeback. ben tracy is in pyeongchang with more. >> wow. a major mistake there. >> reporter: after a disastrous skate in the short program friday, nathan chen was

looking for a redemption. >> this is number 6. yes! >> reporter: and he found it. performing a record six quad jumps in his final skate, the highest technical score ever in the olympics. >> nathan chen is still the quad king! >> reporter: his amazing comeback was not enough to meddle, but it did vault him from 17th place to fifth. crowd favorite adam rippon put on another mesmerizing performance, but nobody could catch japan's yuzuru hanyu. he became the first man to win back-to-back figure skating gold medals, since dick button back in 1992. his trademark, winnie the pooh bears, rained down on the ice in his moment of victory. lindsey vonn made her pyeongchang debut in the super "g," and said she was skiing for her late grandfather. vonn is considered the best female skier of all time, but in her final olympics, a wide turn on the bottom part of the mountain cost the 33-year-old a

medal. she tied for sixth. south korean president moon jae-in visited the olympic press center and said he hopes dialogue between north and south korea will lead to talks between the u.s. and north korea. last week, kim jong-un invited president moon to the north for a summit. president moon, will you attend a summit with north korea? he said, "many people want to know, but it's too early to decide." most of the north korean delegation has now returned home across the border, and president moon says having the north koreans participate in the olympics here has brought some stability to the korean peninsula. ben tracy, cbs news, pyeongchang, south korea. >> ninan: coming up next, the latest on the powerful earthquake that rocked southern mexico. and later, imagination set free-- the special needs young man and his love of legos.

>> ninan: now some stories

we're following on the cbs weekend newsfeed. in southern merck a deadly crab. officials say a military helicopter surveying the damage after friday's powerful 7.2 quake crashed into a crowd of people, killing 13. the quake caused minor damage to buildings in the mexico city region. it also knocked out power to as many as one money homes and businesses. in chicago, a sea of blue as hundreds of officers turned out for the funeral of police commander paul bauer. he was shot and killed earlier this week while chasing down a suspect. city officials also asked mourners watching the procession to wear blue to show their support. and another age-defying feat for tennis superstar roger federer. he's now ranked number one in the world. last time he achieved that was five years ago, which was the longest gap in tennis history. the first time he became number one was more than 14 years ago-- another record. and now that he's 36, he's the

oldest tennis player to ever sit on top. up next, what the g.o.p. should do about mass shootings, immigration, and the opioid crisis. a panel discussion with four retiring republican lawmakers.

>> ninan: at last count, over 40 republicans have announced that they will not run for re-election this year. for tomorrow's "face the nation," nancy cordes spoke with four of them: arizona senator jeff flake. pennsylvania representative charlie dent, florida congresswoman ileana ros-lehtinen, and california representative ed royce. here's part of that conversation. >> reporter: how long are we going to lead the world in maz shootings? >> this is a real problem. it's tearing the country apart, and i think it's a real opportunity for the republican party to step up and be-- be leaders in this debate, and we need to have it because it's just another-- another day of tragedy. are we just going to continue

this throughout the school year? it is-- it is impossible to deal with this kind of grief on a daily basis. >> i'm incredibly frustrated that we haven't moved legislation to prevent bump stocks from being used. and we're pushing to do that. >> reporter: why has your leadership not moved bump stock legislation? i thought everyone agreed on that? >> i think that the thought here is that a.t.f. is going to take those actions on their own. but from my standpoint as a cosponsor of legislation to move something off the house floor, i think we ought to mandate it legislative-- not wait for the a.t.f. >> reporter: senator, when you talk about immigration, mass violence, opioids, has congress lost its ability to solve big problems? >> you know, it would be hard to argue that we haven't. we're back in a place where it requires 60 votes. and we've had a hard time coming together.

>> ninan: tomorrow on "face the nation," you can heartentire panel discussion as well as nancy's interview with republican senator ted cruz. still ahead, the the thing percolating in california over caerng warning labels on cups of coffee.

>> ninan: this could at a bitter taste to your morning cup of joe. an agency says there's a possible risk of cancer from coffee and wants businesses in california to warn consumers. that's led to highly charged lawsuit. here's john blackstone. >> reporter: coffee sellers are steamed. a lawsuit that's been grinding on for years alleges no matter how you make it, your daily jolt of java comes from a potential carcinogen, acryl. >> that's the major reason coffee turns brown. >> bill ristenpart, chemical engineer, teaches the science of coffee at u.c. davis. as an expert witness he of ited that acrylamide forms naturally as foods cooked at high temperature turn brown.

>> that's the major reason you get the yummy brown stuff on the outside of your steak when you char it. >> reporter: but in high doses, acrylamide has been found to cause cancer in mice. that puts it on a list of cancer-causing chemicals that businesses in california are required to alert consumers about. so now, under california's proposition 65, coffee shops are being forced to post signs like this. trouble is, in california right now, cancer seems to be brewing everywhere, at least it appears that way if you pay any attention to these prop 65 warning signs. park your car at an indoor garage, and you're likely to find one. hastings law professor marsha cohen. >> they create in some people concern that there's something lurking in places, and they don't know what it is. >> reporter: but the potential coffee warning may be stretching the intention of the law. >> i believe in transparency, but at the same time, when you put a bold declaration-- "x" may cause cancer"-- when there isn't data to that effect in humans,

to me that causes panic rather than informed knowledge. >> reporter: in a statement, the national coffee association told cbs news: >> reporter: while 13 defendants, including gloria jean's and 7-eleven, have settled and agreed to put up the signs, starbucks is still waging a legal battle, arguing that coffee has benefits. john blackstone, cbs news, san francisco. >> ninan: when we return, from "star wars" to "simpsons." how a young man with disabilities lets his imagination soar.

>> ninan: we end tonight in california with the story of a young man with disabilities. after struggling for years, he found a niche for himself at a goodwill store, where he's creating some amazing works of art, one lego at a time.

mireya villarreal met this remarkable man. >> reporter: from toddler to teenager to young adult, taylor harkins' life has been controlled by his disabilities, like asperger. as a result, he can't drive a car or live by himself and reads at a sixth grade level. but building with legos seems to make his disabilities work to his advantage. how long have you loved legos? >> ever since "star wars" kale out for legos. >> reporter: at this goodwill warehouse, where most of the workers have special needs, harkins sorts through donated bags of random legos. he reassembles the sets, recreates scenes from his imagination, and makes money off of it. >> he built a chess set out of legos. it was really cool. that went for, like, $350. this is our lego area right here. >> reporter: goodwill manager ted mollenkraner created a special position just for taylor. all of his creations are resold on goodwill's online retail

store, shopgoodwill.com, where collectorrors have paid up to $600 for this classic pieces of art. clyde harkins, taylor's father, is happy his son has finally found a place where he fits. did you ever think that the key to his growth and his success would be legos? >> no one knew what the future was, and taylor has played such a huge role in his own future. so it's been an amazing thing to watch and an amazing story to tell. >> reporter: brick by brick, these toys have given his son something every parent wishes for their child: joy. is it work to you, or is this fun? >> super, terrific, happy time is what i like to call it. i just enjoy what i do. >> reporter: mireya villarreal, cbs news, santa an acalifornia. >> ninan: and that's cbs weekend news for this saturday. i'm reena ninan in new york. thank you for joining u

>> live, from the cbs bay area studios, this is kpix5 news. >> it is time to bring in the pets and cover the plants. because, that spring like weather we have been enjoying for weeks, it is finally about to give way to winter. good evening, i'm juliette goodrich. >> about time. i'm brian hackney. it was another beautiful day around the bay area. hope you had a chance the get out and enjoy it. by tomorrow, you will be trading your t-shirts for a thick coat. a live look outside shows we have clear skies over much of the bay area at this hour, the winds are not too bad as we look at ocean beach. live in san francisco. but, things will be changing. there is a persistent bubble of cold air staying in the bay area more than a week. cold air coming out of the gulf of alaska. temperatures in the bay area will descend to below freezing.

we may get a dusting of snow on bay area peaks. santa rosa down to 27 degrees. walnut creek, just 27. we will tell you about the snow and what will happen tomorrow. big changes. we cover the forecast in a few minutes. the city of san francisco is expanding its homeless shelter capacity as the cold weather moves in. starting tomorrow, extra space will be available at the gene friend rec center at the hummingbird center. the first unitarian church on franklin will also have beds available for men only. the homeless outreach team will be out distributing blankets. the cold weather can also be harsh on pets and plants. kpix5's jackie ward is live in golden gate park with advice on how to protect them. >> reporter: so these are obviously not the treeing ant plants we are talking about. we are talking about the avocado plants, the