saying pilots are so exhausted it's a safety threat. this, as a new storm arrives in the west, and is now heading east. ginger zee standing by with where the threat will be by easter morning. twitter's countermove to elon musk's takeover attempt. the poison pill devised to stop the buyout. so will it work? and what is musk's plan b? clashes at a major holy site in jerusalem. palestinians and israeli police facing off, hundreds injured. now, tonight, fears that tensions will spiral out of control. the surreal scene in shanghai. the city on covid lockdown, police in hazmat suits forcing residents from their own homes to make room for new quarantine wards. road rage caught on camera. a driver drove over a woman, then backed over her again, after what was a minor traffic accident. tonight, that driver charged with attempted murder. and celebrating jackie robinson, number 42. the man who broke the color barrier took to the field on this day 75 years ago. good evening. i'm cecilia vega, in for david. as we come on the air, with easter, passover, and ramadan all falling this weekend. one of the busiest travel days of the season. but we begin with the war in ukraine, and russia's new threat for the u.s., after the humiliating loss of its warship. the pentagon believes it was struck by two u.s. missiles. and russia issuing a warning, stop arming the ukrainians or face unpredictable consequences. that warship is at the bottom of the black sea. russia striking back, shelling a missile factory near kyiv, and threatening new attacks. that warning about arming ukraine came after president biden announced an $800 million package of aid. but russian forces appear to be close to capturing mariupol. the commander issuing an urgent plea for help. and james longman is close to that fight in the city of dnipro, and he leads us off tonight. >> reporter: tonight, russia's revenge. strikes on the outskirts of kyiv, including on a factory that makes the anti-ship missiles, like those used to destroy russia's prized warship. tonight, for the first time, the pentagon says it believes that two ukrainian neptune missiles hit the moskva, russia's black sea flagship, sinking it. ukraine claims more than 400 sailors, including the captain, were killed. that would make it the most significant naval loss sustained by any country in more than 40 years. >> translator: the less weapons the russian federation that attacked our country has, the better for us, the less capable they are. >> reporter: and as the war enters its 51st day, the heaviest fighting in the east. this new video circulating on social media shows ukrainian and russian soldiers firing at one another on a road in the donetsk region. as the u.s. begins delivering the $800 million worth of new weapons to ukraine, tonight, an ominous new warning. russia sending a formal diplomatic message to the u.s. and all nations arming the country, demanding they stop sending weapons or risk unpredictable consequences. with so many military setbacks for russia, this stark assessment from the cia. >> none of us can take lightly the threat posed by a potential resort to tactical nuclear weapons. >> reporter: ukrainian president volodomyr zelenskyy also saying the world should be ready for this deadly scenario. >> i think all of the world, all the countries have to be worried because you know that it can be not real information, but it can be the truth. for them, life of the people is nothing. >> reporter: russia's withdrawal from areas around the capital means more brutal discoveries everda moreesmostly vian hn the region. and in bucha's now infamous mass grave site, 350 alone. war crime investigators have begun their forensic research. and further south, the battle for mariupol rages. more than a month of endless bombardment has reduced the city to this, but fierce pockets of resistance remain. the commander of ukrainian marine forces battling to break the siege issued this urgent plea for help. "it can be done, and it must be done as soon as possible," he said. ukraine says 120,000 residents are still stuck there, and possibly thousands dead. but if russia completes its occupation, the true figure may never be known. >> just so much devastation there. james joining us from dnipro, ukraine. you've been reporting on the accusations of russian war crimes. now the u.s. is asking the u.n. to declare russia a state sponsor of terrorism? >> reporter: that's right. president zelenskyy asked president biden to declare russia a state sponsor of terrorism. if designated, they would join countries like iran and north korea on that list. >> james, thank you. and new york's mayor honoring the transit workers who jumped into action tuesday. saying rushing to get passengers out of harm's way saved lives. and new details on the suspect's moves after the shooting. how he managed to hide in plain sight before calling the police on himself. janai norman on this story once again. >> reporter: we're hearing from those being hailed heroes tonight. for the first time, the brave new york city transit workers speaking out. >> passengers were coming off the train, falling to the floor. i was shouting to people, get on the train, get on the train. >> reporter: train operator david artis, describing the tense moments he rushed to get passengers out of the smoke filled subway car to the safety of another train across the platform. artis, along with train conductor, raven haynes, risking their own safety to help evacuate the station. >> as soon as you see smoke, the first thought is, i need to make sure that there's no one physically on my platform. >> reporter: both would lead first responders to the injured passengers. telling abc news they tried to stay brave and calm for their passengers. >> it's like natural instincts kicked in. because as long as we are calm, cool and collected, our passengers can be calm and collected. >> reporter: police now say the suspected shooter frank james blended in with those fleeing passengers. and getting on that same train leaving the scene. and tonight, police piecing together his movements. sources telling abc news the suspect checked into the chelsea international hostel on west 20th street in manhattan the night of the shooting. the hostel denying james stayed there tuesday, but adding that he has stayed there in the past. emerging the next morning and wandering the streets of lower manhattan, hiding in plain sight. at 10:30 a.m. witnesses spotting him sitting outside a restaurant on canal street, appearing to charge his phone. a few hours later, at the famed katz's deli on the lower east side. at 1:42 p.m., james is taken into custody, ending the nearly 30-hour manhunt. the 62-year-old is being held without bail. federal officials have charged him with carrying out a terrorist attack on a mass transit system. he faces up to life in prison if convicted. and late today, the nypd thanking new yorkers for helping find the suspect. five people will split the reward. and the police commissioner saying the public is who the nypd serves, and are often the department's best partners. >> janai, thank you. we're going to turn to the millions on the move tonight. the start of a long holiday weekend. travelers taking ting to the sk and roads for easter and passover. 31 states and territories seeing an increase in new cases of the virus of 10% or more. here's gio benitez. >> reporter: tonight, one of spring's busiest travel weekends now under way. today and monday are expected to be the busiest travel days nationwide. united alone with more than 400,000 passengers a day. delta with nearly half a million. >> i think it will be one of the busiest passover easter weekends we have seen in recent history, perhaps the past three or four, even five years. >> reporter: airfare also up by 40% for domestic flights just since january. this comes after several weekends of mass cancellations blamed on weather and pilot shortages. in fact, the slines pilots union writing to the ceo, saying pilots are so exhausted, it's the company's number one safety threat. in a statement, southwest saying weather and airspace delays led to fatigue in march, and that calls from pilots too tired to fly are a result of the system working as designed. >> this is the industry certainly paying a price for perhaps underestimating how quickly travel would rebound after covid. >> reporter: and now, with the ba.2 subvariant fueling a fresh covid wave, federal officials this week extending the transportation mask mandate until at least may 3rd. new cases and hospital admissions now up 10% or more in many parts of the country. >> once something becomes dominant, usually about a week or ten days later, you start getting a pretty good sense of what's happening with hospitalization. certainly by two weeks, i think we'll have a much clearer picture. >> reporter: keep in mind, on average, more than 2 million people are already screened at u.s. airports every day. this weekend could break pandemic records. cecilia? >> gio, thank you. all the millions traveling this weekend will be watching the weather. tonight, a new storm moving into the west as parts of the south are bracing for severe weather. let's go to ginger zee. ginger, track it all out for us. >> reporter: southern missouri and northern arkansas are under right now. and it's very windy in the great lakes. you go west, and you see the new storm. the sierras should pick up 15 inches of snow. the bay area, some rain. 5 1/2 feet of snow fell in oregon this week, and they'll get more. easter sunday, mobile, shreveport, jackson, mississippi, need to be on the lookout for severe weather. >> thank you. and late today, the white house announcing plans to open up public lands to oil and gas drilling. raising the federal royalties that companies pay to drill for the first time in a century. the move ordered by a louisiana court comes as president biden tries to bring down gas prices. but it also contradicts his commitment to reducing the use of fossil fuels. and twitter's board of directors trying to block elon musk's bid. as kaylee hartung tells us, it's not foolproof. >> reporter: tonight, after elon musk's bid to take over twitter, the company's board fighting back with a corporate defense tactic known as a poison pill. if musk or anyone else acquires 15% or more of the social media platform, twitter will allow other existing shareholders to buy additional shares at a discount. just last week, musk disclosing that he now owns more than 9% of the company, making him one of the largest shareholders. >> it puts a blockade up for musk if he wants to go down the corporate raider route, to ultimately limit his ability to build shares. >> reporter: it's twitter's latest move to box out the world's wealthiest man. last week they offered him a seat on their board. when he found out he wouldn't be allowed to publicly criticize the company, he turned it down. >> twitter has become kind of the de facto town square. >> reporter: just hours after announcing his $43 billion offer to buy twitter, on twitter, musk appearing at a t.e.d. conference, saying his buyout is extremely important to the future of civilization. but he was evasive when asked what he'll do if his offer is rejected. >> is there a plan b? >> there is. >> reporter: twitter says this plan is similar to other plans adopted by publicly held companies in comparable circumstances. musk is known to be unproductable. it's a wait and see game. and tensions in jerusalem erupting. palestinians and israelis clashing. forces storming the mosque. tonight, hundreds of people under arrest. here's lama hasan with the latest. >> reporter: tonight, jerusalem on alert after israeli security forces stormed the al aqsa mosque, one of islam's holiest sites, with muslim worshippers gathered for friday prayers. firing tear gas and stun grenades inside the mosque, more than 150 palestinians were injured, and at least 4 israeli soldiers were wounded. israeli officials insist they waited until after prayers and released this video, which they say shows palestinians throwing stones and fireworks below at the western wall. the site sacred to both muslims and jews, where the haram al sharif and the temple mount are located. clashes here ignited an 11-day war with militants at the gaza strip last year. tensions already extremely high after several recent attacks inside israel, including a gunman opening fire at a bar in the middle of tel aviv, killing three israelis. tonight, the holy city is calm. but some fear it's fragile, with passover taking place during ramadan. as well as easter celebrations. the prime minister saying they're preparing for any scenario. cecilia? >> lama, thank you. tonight, in rome, pope fra francis marking good friday. he did not mention the ukraine war by name. but at the end of the service, he prayed that god disarm the hand raised by brother against brother. still ahead on "world news tonight" this friday, inside the shanghai lockdown. the citizens now protesting the harsh restrictions. where everyone saves when they bundle their home and auto insurance. isn't that right, frank? i saved 25%. booyah. you protected your casa? sure did. and the frank tank? you know it. and now you're relaxing. i'm working from home. sure you are. alright i see a lot of head nods. let's circle back tomorrow. you weren't kidding. save up to 25% when you bundle home and auto with allstate. click or call for a quote today. if you have type 2 diabetes or high blood pressure you're a target for chronic kidney disease. you can already have it and not know it. if you have chronic kidney disease your kidney health could depend on what you do today. ♪far-xi-ga♪ farxiga is a pill that works in the kidneys to help slow the progression of chronic kidney disease. farxiga can cause serious side effects including dehydration, urinary tract or genital yeast 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doctor about living longer with kisqali. finally tonight, baseball stadiums across the country are honoring the great jackie robinson. 75 years ago, the dodgers first baseman changed baseball and history, putting on that number 42. today, in stadium after stadium, a tribute for the number 42. it was 75 years ago today, april 15th, 1947, ebbets field in flatbush, brooklyn. a young jackie robinson on the field with the brooklyn dodgers, the first african american to play in a major league game. he would go on to win rookie of the year, beginning an electrifying hall of fame career. today, tributes from all over the country. at new york's citi field, where the rotunda is named after him, this statue, nine feet tall, towers with robinson's retired number. every player wearing 42. robinson's granddaughter right there too. >> the granddaughter of jack r roosevelt robinson. >> reporter: and in times square, 42nd and broadway is today jackie robinson way. former players and managers honoring his legacy. >> he went through things that i can't imagine what he's gone through. >> he would light up a room. he stood for more than baseball. >> reporter: he didn't just break the color barrier on the field, he was a leader in the civil rights movement. jackie's son david remembering when they attended the march on washington. >> he was a man of few words, but a man of action, responsibility. >> reporter: and tonight, his granddaughter vowing to continue his legacy. >> carrying his legacy forward is the most important job that we have as grandchildren, to ensure that the next generation understand the commitment, the sacrifice he made. an foratching.zing lm cia vega. have an amazing weekend. if buiy area moving forward finding buiy solutions, this is abc 7 news. started recording and realized that there were exchanging electronics. usually so like a large number of laptops ipads cameras, things like that. an open-air market force stolen goods in san francisco, but it's not the only one today the dramatic rise in street vendors in another neighborhood and what we're told about those sales and as millions prepared to gather for the holiday weekend concerns about potential spikes in covid-19 cases loom this as cases the nation continue to rise. good afternoon. i'm kristin z and i'm larry beale. thanks for joining us. we'll start with what turned into a wild chase from vallejo into san francisco this afternoon sky 7 caught up with this pursuit as it made its way across the bay bridge onto san francisco city streets. you see the driver right there at times slowing down in gridlock and then making aggressive moves to be elusive highway patrol officers. we're following behind the en a of space the driver would suddenly hit the gas veering out of the shoulders zipping past traffic making abrupt u-turns at one point he got off at interstate 80 at 9th street and let offices around city street south of market, but we now understand officers have since lost the vehicle. they were chasing the highway patrol tells us the car that they were after was reportedly stolen and that's what started this whole episode in vallejo will keep you posted if there's any more updates now to a major change in the mask policy at oakland schools today the district announced it's indoor mask mandate will be lifted on april. fourth masks will still strongly be recommended starting monday april 25th today the cdc announced that $100 million americans have received a booster dose since august. this comes on the same. dr. anthony fauci told cnn that the concept of herd immunity may not apply to covid-19 dr. fauci says current vaccines haven't shown the ability to provide long-term immunity like the vaccines used against polio