>> cricket jokes. we'll see you at 6:00. ♪ ♪ ♪ captioning sponsored by cbs >> jiang: tonight, urgent warning. with russian troops battle ready, the u.s. and other countries tell their citizens to get out of ukraine now. >> we're in the window when a russian invasion could start at any time. >> jiang: today, presidents biden and putin talk by phone amid a flurry of diplomatic efforts to defuse the crisis. and in the capital, kyiv, new calls for unity and peace with war looming. >> reporter: i'm imtiaz tyab near the border with ukraine and belarus, where russia continues to flex its military might. >> jiang: today police clear a critical crossing with the u.s. as protests against vaccine rules paralyzed other routes.

in france, a copycat protest in paris is met with tear gas. plus, betting bowl: the big game kicks off with a gambling blitz. >> reporter: i'm carter evans. with sports betting now legal in much of the country, the stakes are high at the super bowl. >> jiang: and later, the new mission for former cadets of the first and only black military academy in america. >> it is a legacy, a history that needs to be told. >> this is the "cbs weekend news." >> jiang: good evening, everybody. i'm weijia jiang in new york. adriana diaz is off. today, president joe biden again warned rusian president vladimir putin of the cost of any invasion of ukraine. more than a dozen nations have urged their citizens to leave the country. today, more planes carrying u.s. troops from the 82nd airborne division flew in to poland. thousands of ukrainians braved

winter cold to rally in kyiv to show unity against threat. for latest we begin with cbs' christina ruffini at the white house. christina, good evening to you. >> reporter: good evening, weijia. the white house says that call between two world leaders didn't produce any major breakthroughs, and a senior ranking official tells us they're still not you're whether or not vladimir putin has made the decision to invade. but early this morning, the state department pulled most of its diplomats out of the embassy in kyiv, just in case. during the hour-long conversation, the white house says president biden urged president putin to engage in de-escalation and diplomacy, but the time for diplomacy is running thin. traveling in fiji, secretary of state antony blinken said the u.s. still has not received a written response to its security proposals. >> we're in the window when a russian invasion could start at any time. >> reporter: and russia now has 80% of the troops it would need

to invade positioned along ukraine's borders. >> any american in ukraine should leave as soon as possible, and in any event, in the next 24-48 hours. >> reporter: about 7,000 americans in ukraine have registered with the state department. national security adviser jake sullivan said yesterday, anyone who stays should not expect a u.s. military rescue. >> the president will not be putting the lives of our men and women in uniform at risk by sending them into a war zone. >> reporter: 3,000 u.s. troops, however, are headed to join units already positioned in poland and romania, with 8,200 on standby to back up other nato allies, in case putin's territorial aspirations expand beyond ukraine. >> jiang: and christina joins us live from the white house now. christina, jake sullivan said it was an urgent message for those american and state department officials to get out of ukraine. what can you tell us about how they're leaving and where they are going? >> reporter: well, weijia, planes, trains, automobiles--

the white house has made very clear it doesn't care how you leave, but those options are still available and civilians need to take them now. as for who is left in the embassy, there is going to be a small contingent there that will deal with the ukrianian government. most of those diplomats are going to leave the country, but another group is going to go to a city called lviv, closer to the polish border, to provide american citizens emergency services should they need them when trying to leave the country. >> jiang: christina, thank you. ukraine's government is telling people to stay calm and united. it also warns the country is almost fully surround bide hostile forces. cbs' imtiaz tyab is there. >> reporter: good evening. well, this growing threat of a russian-led invasion has seen ukrainians take to the streets here in the capital, calling for peace. in the heart of kyiv, the largest demonstration opposing war since these tensions began. they're demanding it vladimir putin keep his hands off ukraine

after western governments issued frantic warnings the russian president could launch an attack any day now. but not everyone here is so convinced. >> of course i'm worried. but am i afraid? not-- no, i don't think so. >> reporter: ukraine's leader, volodymyr zelensky, agrees. >> the best friend for enemies, that is panic in our country. and all of this information that helps only for panic. it doesn't help us. >> reporter: but with russian warships already in the black sea, and these enormous live- fire military drills in neighboring belarus, the global panic is fueled by the fear an all-out war here could kill tens of thousands and destabilize europe. on ukraine's northern frontier, these border forces patrol the narrow sliver of territory separating ukraine and belarus. the commander in charge is margaryta vershynina. what is your plan if something does happen?

she says, "we can't reveal our plan, because it's secret. but with the military, we will keep this border safe." now, defending against the russian invasion, however likely, would be a tough task for ukrainian forces. tonight, international pressures mounts on vladimir putin not to strike. weijia. >> jiang: imtiaz tyab in kyiv for us, thank you. tonight, what began as a truck convoy protest in canada against vaccine mandates has snowballed into a tense international standoff. today, police moved to clear protesters from the ambassador bridge, the busiest u.s.-canada crossing, connecting detroit and windsor, ontario. tonight, cbs' kris van cleave is there. >> reporter: weijia, the ambassador bridge is responsible for one-fourth of the trade between the u.s. and canada. canada is america's largest trading partner. this is the protest that has kept that bridge shut down for six days now, something the police would like to see change. breaking down the border

blockade. with canadian police slowly moving in, anti-vaccine mandate protesters started clearing out saturday, blasting their horns on the way. angry stragglers stayed behind, onfronting police.tayed behind, >> who are you protecting? >> we're just as passionate about our bill of rights and-- in this country as you are about yours. >> reporter: the law enforcement action follows a court order for protesters to move away from the ambassador bridge. the key border crossing carries 10,000 a day between the u.s. and canada, transporting about 325 million dollars' worth of goods. the now six-day blockade has disrupted auto plants in canada and several states. analysts estimate it's cost car makers 700 million and counting. >> so, they have not caused mass outages just yet. but i think we're on the brink of them having that effect. >> reporter: this is the third weekend of protests that began with a cross-country trucker convoy rolling into canada's

capital, ottawa, bolstered by anti-vaccine groups. >> the government needs to quit mandating stuff. >> reporter: protesters have also disrupted the border crossing at coutts, alberta, just across from montana. the blockades have been condemned by the trucking industy and called illegal by canada's prime minister. bruce heyman is the former u.s. ambassador to canada. >> there was no expectation that this group of people who were legitimately protesting would be radicalized by extremists. and they are being encouraged now, quite actively, almost daily, by some extremists within the united states. >> reporter: even if this border closure is short-lived, analysts say it could take the auto industry months to catch up. and, of course, there remains concern about similar protests starting on the u.s. side of the border. weijia. >> jiang: chris, thanks. canada's horn-honking protesters have led to copycat demonstrations in france. today in paris, police fired

tear gas against people who deified orders to leave and told them to stop disrupting traffic near the arc de triomphe. some 500 vehicles were stopped at checkpoints trying to enter the french capital. walmart says that fully vaccinated employees will no longer have to wear masks unless state or local rules require it. nationwide, new covid infections topped 149,000 on friday. that's down 43% over the last week. still, the c.d.c. reports that the virus remains highly transmissible in 99% of all u.s. counties. as omicron fades, medical experts and politicians nationwide are reconsidering masking requirements and covid restrictions. but some of them are clashing over the best path forward. it's a great opportunity to check in with dr. david agus. dr. agus, thank you so much for making some time for us. so, on the one hand, the number of cases continues to go down.

which is great. on the other, 99% of the country still has high transmission rates. so some states are already loosening restrictions, but the c.d.c. is not budging on their recommendations. what should someone do if their state leaders are telling them something different than the c.d.c.? >> well, the key thing now is it's not just transmission rate, it's hospitalization rate. so when there is adequate space in the hospital, when we have oral drugs like want pfizer drug and the monoclonal antibodies that work, we can lower mask mandates and go back to a new normal. the key is it's different all across the country depending on what city you live in. but transmission rates are not the only metric now. >> jiang: given how many states are now doing their own thing, do you think that puts pressure on the c.d.c. to change federal guidelines at all? >> yeah, it's difficult for the c.d.c. because there's not going to be one size fits all. what the c.d.c. needs to do is set parameters.

if you have this many hospital beds vacant, it's okay to go to these restrictions. if case numbers are "x," you can go to "y." it's going to be different depending where you live. >> jiang: one big game changer we have been talking about is the vaccine for kids under the age of five. but on friday the f.d.a. came out and said they need more data. see how three doses of the pfizer vaccine would impact a child before making any decisions. why is that? and how could that impact the timeline? >> well, the two-dose vaccine had benefit clearly. it blocked serious illness. but the three is better. you get better correlates of immunity. the three-dose data should be complete in the next several weeks and then filed. i think what the f.d.a. wanted is to have one package, do it once and get it, so parents understood that the data were meaningful, that the vaccine was safe, and that worked. that will be the three-dose shot and hopefully that happens towards the end of march, beginning of april. >> jiang: all right, dr. david agus, thank you.

super bowl lvi kicks off tomorrow and it's a homecoming of sorts. the first n.f.l. championship was played at l.a.'s memorial coliseum in 1967. tomorrow, the big game takes place at the most-expensive stadium ever built. cbs' carter evans is outside sofi stadium with more. carter, good evening to you. >> reporter: good evening, weijia. temperatures tomorrow could be close to 90 crazy outside sofi stadium, and that would make it the hottest super bowl on record. also heating up-- the action on the sports books. the stakes are high, not only for the bengals and rams, but also for millions of americans betting on the big game. >> new customers can bet $5 and win $280 cash. >> reporter: we're just now getting to a point where the majority of us who might want to bet on sports have access to that and that's really exciting. >> reporter: a new study by the american gaming association suggests a record 31.4 million americans will wager an estimated $7.6 billion on the

super bowl, up more than $3 billion from last year. sports betting is now legal in at least 30 states. you used to think of the bookie in the alley. >> it's a much more sophisticated model now. i think what we've seen is a lot of americans who finally have access to legal sports betting closer to home are taking advantage of that opportunity. >> reporter: almost no one predicted this year's match-up. in the most-expensive stadium ever built, hosting its first super bowl. right now, 76% of money line bets that don't involve a point spread are predicting the bengals will win. but players on both teams say their focus is on the field. >> once the ball is kicked off, i mean, we're just going to play the football game, try to get it done. >> we've proven if you underestimate us, we're going to beat you. >> reporter: and it's not just diehard football fans placing bets on the game. people are betting on everything from the coin toss and the color of the gatorade to the high- priced super bowl ads. >> alexa? >> reporter: but there are also

real concerns this new rise in legal gambling could have a human cost and fuel even more gambling addictions. weijia. >> jiang: that is a lot on the line. thank you so much, carter evans, in los angeles. straight ahead on the "cbs weekend news," team u.s.a.'s jessie diggins winning battles on the snow and in life. cough cough sneeze sneeze... [ sneezing ] needs, plop plop fizz fizz. alka seltzer plus cold relief. dissolves quickly. instantly ready to start working. so you can bounce back fast with alka-seltzer plus. now available for fast sinus relief. my daughter has type 2 diabetes and lately i've seen this change in her. once-weekly trulicity is proven to help lower a1c. it lowers blood sugar from the first dose. and you could lose up to ten pounds. trulicity is for type 2 diabetes. it isn't for people with type 1 diabetes. it's not approved for use in children. don't take trulicity if you're allergic to it, you or your family have medullary thyroid cancer, or have multiple endocrine neoplasia syndrome type 2. stop trulicity and call your doctor right away

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>> jiang: the u.s. grabbed more gold today at the 2022 beijing winter olympics. lindsey jacobellis won her second gold medal of the games, finishing first, alongside teammate nick baumgartner, in the debut of mixed gender team snowboard cross. in men's hockey, the u.s. beat canada 4-2, in a game that will play a big role in determining who wins their pool and gets a bye to the quarterfinals. checking on the medal count, the u.s. now ranks third behind germany and norway. cbs' jamie yuccas profiles an

american who beat the competition and won a personal battle along the way. ♪ ♪ ♪ >> reporter: if they gave out gold medals for unbridled enthusiasm, it jessie diggins would have a boat load. whether hiking or biking, in the kitchen, or in the gym, she's a social media celebrity. >> surprise. >> reporter: but that's what happens when you deliver one of the signature moments of the 2018 winter olympics. >> here comes diggins! >> reporter: this week, diggins did it again, an american record, a bronze medal, and that all-american smile. what does click in your head for you to be able to just push at the very last second? >> i don't like having regret. i hate the "what if" game. so i like crossing that finish line knowing that there was not one drop of energy that i held back. >> reporter: before she could walk, her parents toted her across the minnesota landscape.

diggins dominated minnesota's high school ski clubs, a multi- state champion with a relentless drive for perfection. but in her senior year, the drive became all-consuming. diggins found herself in what she called a slow spiral. >> i think i felt a lot of shame and guilt and denial about the eating disorder i had. >> reporter: i find it so interesting because i think there's this idea out there that athletes are immune to eating disorders because you need to fuel your body in order to perform. that's not true. >> no. no one's immune to them. >> reporter: her family was there for her, and mom, deb, heard about the emily program, where she received intensive therapy and treatment. >> i needed to learn how to love myself again. >> reporter: and she's become a dedicated ambassador for the program. sound like you learned a big lesson. >> i did. i learned a lot about how to absorb stress and pressure and use very healthy tools, maybe it's, you know, video calling

with my fiancée and talking about the day. maybe it's taking the dog for a walk. maybe it's playing games with my teammates. >> reporter: and at this medal ceremony, in typical fashion, diggins danced, jumped for joy, and thanked her entire team whos the finish line. and more hardware is possible. the team sprint is next week. jamie yuccas, cbs news, beijing. >> jiang: still ahead on the "cbs weekend news." the gift of love is not cheap on this valentine's day. so, the last two years that i've had my dexcom have been the most adventurous years of my life. i never realized that i loved hiking. i never realized that i loved running. this is incredible. i really worry about lows to the point where i let it get in my way for years. the alerts are a miracle. it's changed my life. a hundred percent. i love my dexcom. i really do.

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>> jiang:happy valentine's day just a touch early. this weekend, the paramount miami world center is lighting up the skyline with l.e.d. cupids and hearts. the digital display on the 60- story tower is thought to be the world's tallest valentine. from a big display to big spending. americans are expected to shell out an estimated $24 billion this year on valentine's day gifts. that's up $2 billion from last year, and the second highest total since the national retail federation began keeping score. now, i love some flowers and chocolate, but that is just me. next on the "cbs weekend news," former cadets push to save the forgotten history of an old military academy. you don't get much time for yourself. so when you do, make it count with crest pro-health.

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class of '68, say they learned lessons for life. >> discipline, a structured lifestyle. >> humility. >> trust. >> yes. >> leadership. >> reporter: st. emma's shaped thousands of african american men just after reconstruction through the civil rights era, but most people haven't heard of it. why do you think people don't know so much about this place? >> people didn't want this school in this community, you know. >> yeah. >> a lot of prejudice and racism was going on. >> reporter: the land st. emma sits on, known as belmead, has a dark past. st. emma's buildings and that of the corresponding all-girls' school, st. francis de sales, were built by enslaved people. and unknown to walker and butler until after they graduated, 130 of those people were buried right here. >> we're standing on the shoulders of those people. >> reporter: st. emma's shut its doors 50 years ago, and shortly

after, many of the dozens of buildings were bulldozed. >> it's been hard for us to come here to see that there was nothing left. >> reporter: the two friends have been on a long mission to keep the story of st. emma and st. francis alive through tours and contributing artifacts to be reviewed for admission into the african american history museum in the nation's capital. embodying the lessons learned on this land. >> this was an area of enslavement that turned into empowerment. >> reporter: to tell the story to generations to come. debra alfarone, cbs news, powhatan, virginia. >> jiang: and generations will be better off knowing that beautiful story. that is the "cbs weekend news" for this saturday. don't forget, "sunday morning with jane pauley," first thing tomorrow, followed by "face the nation," with margaret brennan, and the latest on the ukraine crisis. i'm weijia jiang in new york. good night.

captioning sponsored by cbs captioned by media access group at wgbh access.wgbh.org easing restrictions and emerging from the omicron wave. the county pulling the plug on the mass vaccine sidewalk. to lift covid vaccine mandates. it feels like summer but as you know, it's only february. crowds flocking to the beach and filling parks in the middle of the winter. unseasonably warm temperatures making for a busy weekend. there will be one more day just like this, but next week with 's average temperature wise. at the rescue from a three alarm fire that prompted 100 firefighters to respond.

the states, positivity rate continues to move in the right direction. as of today, it is sitting at a 23% and that is a huge change from exactly one month ago the positivity rate was up nearly 22%. on the peninsula we are starting to see more signs that the omicron wave is subsiding. we go to san mateo with more on that, plus how businesses and locals are preparing for research and sees. i see demand is low and in the meantime, business owners and locals are preparing for the indoor mass mandate to expire a couple of days and infectious disease experts tell us the allcon wave is not over just yet but the prognosis is getting better by the day. on saturday, those heading to san mateo county that center were focused on volleyball, not vaccines. it was the first time in several months the site did not serve as the county's