vaccine. moderna showing its vaccine at half the adult dose offers a strong immune response for children 6-11. the biden administration says it's ready to vaccinate 22 million children possibly as early as next week. news about the deadly shooting on a movie set in santa fe. production now on hold. what we're learning. facebook under fire. leaked internal documents raising more questions about the company and whether it's fueling hate and violence. america's supply chain crisis in need of a solution. amazon expanding its number of ports. the postal service, u.p.s. and fed fedex making plans. the story behind this sign. the 9-year-old boy getting tom brady's attention. >> announcer: from abc news world head quarters in new york, this is "world news tonight" with david muir. good evening, everyone. thanks for joining us on this busy monday night. i'm linsey davis. david is on assignment. several develop stories. news on covid vaccines and children and 70 million americans on alert with severe weather. we begin with that shooting in idaho. this was the scene outside the boise town square mall. police responding to reports of shots fired inside. mall security sending out alerts. a caller to 911 reporting a suspect wearing dark clothes. police going carefully through the scene. mall employees and shoppers huddling together outside. at least one person is in custody. kayna whitworth leads us off. >> reporter: tonight, the moment between father and son -- and tom brady. >> shooting at boise town square. >> reporter: police say six people were injured inside the city's largest shopping mall. >> primary suspect wearing all dark. >> reporter: one story worker telling us her and other employees to the shooting. she says they and about a dozen customers then rushed to a back room to hide from the gunman. >> we went to the pretzel stand to get pretzels and all of a sudden we heard gun shots. >> reporter: officers methodically going store by store searching for victims. authorities confirming at least one person now in custody. this investigation is just beginning. authorities combing through two separate crime scenes, inside the mall and another about a block away. roads have been closed for hours. linsey? >> kayna, thank you. we're learning moments ago two people have died. now to the dangerous storm coast to coast and a possible nor'easter brewing. more than 70 million americans on alert. a massive storm system with an atmospheric river slamming the coast. areas stricken by drought and wildfires, a powerful water fall there in california. in the midwest more severe storms after 13 reported touchdowns. this near kansas city. new jersey already declaring a state of emergency ahead of the possible nor'easter. rob times it out, but first will carr in california. >> reporter: tonight, powerful winds and historic rainfall lashing the west coast. a potent atmospheric river slamming the region for more than 24 hours. this big rig overturning on the bridge. off the washington coast, the strongest storm on record. east of seattle, two people killed sunday when a tree struck their car. back in california outside sacramento this man grateful his son is alive. this tree crashing into his son's car minutes before he was set to go to work. >> i can't think what would have been if he were walking up the walkway. >> reporter: near the san francisco airport, trevor stines' neighborhood under water. >> my whole garage is up to my knee caps. everything is floating around. >> reporter: that storm already dropping more than a dozen touchdowns in the heartland. >> we have a basement, but there wasn't time. once you see the tornado, there's no time. >> reporter: millions bracing for a potential nor'easter. we've heard a chorus of chain saws here today. it's a massive clean up operation going on. all of that rain did put a dent into the potential for more wildfires and into the drought. here in california we've had wildfires into december in recent years. we still have a long way to go. >> not out of the woods. will, thanks. let's get to rob marciano tracking it all. rob, time out this threat for us. >> reporter: it's beginning to move east. it's set records in terms of the strength in the ocean and rainfall in california. the center going into british columbia. the moisture plume heading to southern california. the energy will jump into the plains tomorrow. we'll see severe weather from nebraska into texas. here in the east we're dealing with severe weather in the carolinas and flood watches along i-95. heavy rain tomorrow morning. possible flooding in new york city. lingering wind and rain in new england. linsey? >> rob, thanks so much. next, a new shot of hope for children. moderna announcing the results of their latest study finding it was safe and event if in children 8-11 years old. it's a half dose of the adult vaccine. tomorrow an fda advisory panel will review pfizer's vaccine for children 5-11 years old. it could clear the fda and cdc by the first week of november. when it does, the biden administration says there will be millions of doses ready to go. here's abc's erielle reshef. >> reporter: just a day before an fda panel is set to review and rule on pfizer's vaccine for 5 to 11-year-olds, promising news on moderna's vaccine in younger children. the company reporting a strong immune response in kids 6 to 11. at just half the adult dose, two shots given 28 days apart produced one and a half times the antibodies seen in young adults. and like pfizer, moderna says its vaccine was safe in the younger group with mild side effects like headache, sore arm, fever and fatigue. >> pediatricians who care for these kids want to find a solution. it's a miracle we potentially have one. >> reporter: 28 million children could be eligible for a pfizer shot as early as thursday, november 4th, after a green light from the fda and cdc. the pfizer vaccine was found to be 91% effective in 5 to 11 year olds. pediatrician amanda dropic enrolled all four of her children in the pfizer trial. >> if it's something i can prevent with a vaccine that is both safe and effective, that's my job -- to protect my kids and other people's kids to the best of my ability. >> reporter: 11-year-old eli and 9-year-old lila say they'll encourage their friends to get vaccinated. >> they should definitely get vaccinated. it really doesn't hurt and it's definitely worth it even if you get a few side effects. >> reporter: just as soon as the vaccine is authorized for 5 to 11 year olds, the white house says millions of doses will ship out so they are ready at doctor's offices, children's hospitals, pharmacies and clinics. >> for a lot of parents they don't get time off work. if you want an appointment that works for you, it's not too soon to call up and get in line. >> erielle, certainly all eyes on tomorrow's fda panel meeting on the pfizer vaccine. walk us through the next steps. >> reporter: well, that fda panel is expected to make its decision by the end of tomorrow. if the fda gives the green light, then the cdc could sign off by next wednesday which means we could see some of those younger children get their shots in arms by the end of next week. >> to the relief of many. erielle, thank you. next, new details about the fatal shooting on the set of the movie "rust." the crew providing affidavits to investigators about the scene being rehearsed in a church. the weapon set up by the armorer hannah reed. they say it was the assistant director who handed it to alec baldwin. kaylee hartung with more. >> reporter: tonight, new eyewitness accounts are giving a more detailed picture of just what happened in this chapel moments before an up and coming cinematographer was fatally wounded on the movie set of "rust." >> so was it loaded with a real bullet or more? >> i don't -- i cannot tell you that. >> reporter: in search warrants obtained from authorities in santa fe, new mexico, the film's director joel souza telling investigators alec baldwin was sitting in a church pew, preparing for a scene. as he practiced drawing his weapon baldwin pointing the revolver towards the camera lens. souza says he was standing behind that camera, looking over the shoulder of cinematographer halyna hutchins when he herd what sounded like a whip and then loud pop. a projectile fired, striking and killing hutchins, then piercing souza in the shoulder. a cameraman telling investigators there was no video or audio being recorded at that time. an affidavit saying that the gun was one of three prop guns set up by the armorer hannah gutierrez-reed. and that assistant director dave halls, grabbed the gun off a cart outside the church, then handed it to baldwin on set, yelling "cold gun," indicating to everyone there that the prop gun did not have any live rounds, which the a.d. told investigators he believed to be true. industry safety standards ban live ammunition from movie sets. souza telling investigators protocol onset was for reed to inspect the gun and then halls before he would hand it over to the actor. >> that chain of command is usually the first a.d. and the armorer and the actor, and that's usually the people that interact with that gun. but the first a.d. won't be touching the gun, they won't be picking the gun up off of a cart. >> reporter: as armorer, 24-year-old gutierrez-reed was responsible for all weapons on set. six weeks ago on a podcast she described how nervous she was learning her trade. >> i kinda just caught on by myself. i think loading blanks was like, the scariest thing to me, because i was like, oh, i don't know anything about it. >> reporter: tonight the head of "rust's" electrical department "calling out the producers" in a post on facebook, writing he worked with hutchins on "almost all of her films" and that he believes her death was "the fault of negligence and unprofessionalism." we just obtained a letter from the film's production company saying production here is wrapping until veinvestigations are over. linsey? >> kaylee, thank you. now tonight president biden urging his party to strike a deal before he leaves for europe on thursday hoping to tout his domestic agenda on the world stage. the president met with senator joe manchin. the senator says he still has concerns, but he's optimistic. facebook confronted with a new round of criticism tonight. the former facebook data scientist turned whistle-blower saying the social media giant chooses growth and profit over safety. the new details of facebook's actions around the events of january 6th. here's abc's chief justice correspondent pierre thomas. >> reporter: a leak of thousand pages of internal documents tonight raising more questions about facebook and whether or not the social media giant has fueled hate. facebook whistle-blower francis hog haugen provided the redacted documents to congress. abc news and 16 other news outlets then obtaining a copy of the files. >> facebook makes more money when you consume more content. >> reporter: haugen, who testified before congress earlier this month, spoke today in front of the british parliament. >> it pushes you to extremes and fans hate. ager and hate is the easiest way to grow on facebook. >> reporter: a set of the documents showing that restrictions deployed by facebook to limit potential harmful content and mitigate violence were rolled back after the 2020 election. on january 6th, the day of the insurrection, an internal report showed that posts calling for violence and incitement surged alarmingly. user reports of false news hitting nearly 40,000 per hour. a set of documents suggesting that restrictions deployed by facebook to limit harmful content and mitigate violence were rolled back after the 2020 election. facebook ceo mark zuckerberg has responded to the accusations in a post saying the argument that we deliberately pushed content that makes people angry for content is deeply illogic call. facebook says it's working to reduce inflammatory content. today in an earnings meeting zuckerberg says he's looking to focus on a younger audience. linsey? the fbi reports a dramatic increase in hate crimes in 2020. overall the number of reported hate crimes rose 30% in 2020. that's the highest number in two decades. the majority of attacks targeted african-americans up 63% in 2020. hate crimes against asian americans surged 76% last year and many attacks may have gone unreported. next, the race to find new solution toss the supply chain crisis with the holidays quickly approaching. amazon is adding more planes, fedex and u.p.s. is hiring more workers. will that all be enough? here's abc's transportation correspondent gio benitez. >> reporter: tonight, amazon saying it's taking action to offset the growing supply chain crisis. >> we spend the full year thinking about how do we get ready for the holiday season, this year especially, and with the pandemic, it's been more challenging than most. >> reporter: the retail giant says it has increased the number of ports of entry it uses by 50%, doubled its capacity to process containers at ports, and will expand its fleet of amazon cargo planes to 85 later this season. >> we've added airplanes. we've added trailers. we've added trucks. we added vans. and so it allows us to see kind o how do we optimize our network for customers. >> reporter: the u.s. postal service, fedex and u.p.s. also looking for solutions to the crisis. boosting capacity and hiring thousands more workers. the post master general telling the wall street your honor al journal, quote, we're going to kill it this season. severe weather like we've seen the past 24 hours impacting cargo ships stranded off bottlenecked ports on the west coast. a massive fire breaking out on this cargo ship near victoria, canada, after dozens of its shipping containers plummeted into the ocean. with all the trouble off the coasts, secondary ports in cities like miami looking to draw more business to their shores. linsey, here on one of amazon's cargo ramps, the company says it plans to have those 85 planes in the air by december. linsey? when we come back the disturbing discovery inside a home in houston. three young children abandoned inside and what authorities are saying tonight. are everything to me. ands but i was diagnosed with dupuytren's contracture. and it got to the point where things i took for granted got tougher to do. thought surgery was my only option. turns out i was wrong. so when a hand specialist told me about nonsurgical treatments, it was a total game changer. like you, my hands have a lot more to do. learn more at factsonhand.com today. ok everyone, our mission is to provide complete, balanced nutrition for strength and energy. whoo hoo! ensure, with 27 vitamins and minerals, now introducing ensure complete! with 30 grams of protein. you founded your kayak company because you love the ocean- not spreadsheets. you need to hire. 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bed after surgery. all the while getting stronger. playing catch in the hospital. and after months of treatment, his doctors now say noah is cancer free and gave him the all clear to go to sunday's game. wearing his jersey before the game. making a sign. carrying it into the stadium -- "tom brady helped me beat brain cancer." brady spotting noah in the crowd. giving him a hat and shaking his hand. noah's head in his hands overcome. afterwards, brady on the moment. >> obviously tough kid, man. and, puts a lot in perspective to what we're doing on the field. in the end, it doesn't mean much compared to what so many people go through. >> reporter: tonight, noah and his dad, james, are grateful. >> that was amazing. i'm so blessed. >> yeah, you are. we all are. >> so blessed. so sweet. thank you so much for watching. i'm lindssey davis. good night. announcer: bilding a better bay area -- moving forwards, finding solutions. this is abc 7 news. >> flooded roads, roads, roads, creaks and downed trees. people across the bay area are leaning up from that major record-breaking storm. >> this is as high as it has been in 10 or 20 years. >> the house just moved. it was a thud. >> thank you joining us. you are watching abc 7 news at 4:00. >> we have live team coverage ae the bay area recovers. spencer and sandy will have rain totals and what you can expect for the rest of the day. kristen: let's begin live in santa rosa. -- ours in this community. it overflowed and receded and then four units to my left were completely flooded. in disbelief, he walked walked his home with water up to his ankles, flooding his entire first floor. water kept rushing in. next door was zachary newman with his brother and sister-in-law, piling blankets against their sliding door. their home directly behind the creek. we were running upstairs,s, to keep the barrier up, trying to grab thick towels. >> were surrounded by water. >> it started from the back yard but once it surrounded the apartment the link, i started to see more. >> he kept track