president. scploft testimony at the ghislaine maxwell sex trafficking trial. jeffrey epstein's personal pilot says, under oath, he flew former presidents, hollywood stars, and a prince on the convicted sex offender's private jet. teacher shortage: the desperate measures some school districts are taking to deal with understaffing, like a principal stepping in as teacher and custodian. our cbs news investigation: could your kids be buying drugs on social media? how easy dangerous narcotics are to find. one family's story. >> it can be your kid. >> o'donnell: and after an incredible journey to the summit, what one seven-year-old wants us to know about never giving up. >> this is the "cbs evening news" with norah o'donnell, reporting from the nation's capital. >> o'donnell: good evening, and thank you for joining us. we're going to begin with an all-too-familiar american tragedy-- another deadly school shooting. it happened today at oxford high school. that's just north of detroit. three students are dead, eight people wounded, including a teacher. the suspected gunman is in custody. he's 15 years old, and we are told at this hour not cooperating with authorities as they try to determine the motive for the attack. well, before the pandemic, the u.s. was averaging about two dozen school shootings per year. well, this year, there have been 28, including this latest one. tonight, president biden is reacting, saying his heart goes out to the family's. cbs' nancy chen raced to the scene today and leads off our coverage in oxford, michigan. >> reporter: we're being kept about a half mile back from the scene right now as police get ready to search the suspected shooter's home. the f.b.i. is also here sifting through surveillance video and social media, as investigators look into a motive behind today's tragedy. the first of more than 100911 calls came in just before 1 p.m., an active shooter at oxford high school. >> we need medical assistance, multipl ambulances if possible. >> reporter: swat team members rushed to the school where authorities found 11 people shot. >> two are in surgery, six are in stable condition. there are a total of 11-- three dead, eight shot. >> reporter: within five minutes of the first call, deputies confronted the 15-year-old suspect who surrendered. >> we recovered multiple shell casings in the school. we're thinking, you know, 15 to 20 shots that were fired. >> reporter: police say the shooter had several magazines and appears to have acted alone. students were evacuated through the snow to a nearby supermarket parking lot. >> i have seen him around the school, and he's, like-- he's a kid, you know. he's a regular kid that goes to school, you know. >> reporter: michigan's governor gretchen whitmer called it every parent's worst nightmare. >> my heart goes out to the families. this is an unimaginable tragedy. >> reporter: the youngest student killed was just 14 years old. and tonight, the suspected shooter is refusing to talk and has asked for an attorney. the sheriff's department says he could be tried and charged as an adult, norah. >> o'donnell: nancy chen with that breaking news. thank you, nancy. we want to turn now to theoid pandemic. the head of the federal reserve said today that the new variant, omicron, could throw a wrench into america's economic recovery, slowing hiring and hampering the fight against inflation. well, that sent shock waves through wall street. the doug fell more than 600 points. that's a loss of nearly 2%. more than 200 cases of the new have turned up in 20 countries. we get more now from cbs' errol barnett. >> reporter: even before omicron cases are confirmed in the u.s., tonight, researchers are preparing for its arrival, racing to analyze the strength of the arsenal to fight it. today, moderna's c.e.o. told the "financial times" there is no world where his companiay vaccine has the same level of effectiveness against omicron as it does with the delta variant. and regeneron, makers of an antibody treatment that can reduce risk of hospitalization and death by 70% in high-risk patients, says early evidence shows it is less effective against omicron and may need to be updated. meanwhile, the u.s. is stepping up its surveillance system for tracking new coronavirus variants. >> we are now sequencing approximately 80,000 samples per week, about one in every seven p.c.r.-positive cases. and that's more than any other country. >> reporter: currently, testing antibody response against the new variant is dr. david ho of columbia university. >> we suspect that there will be a significant amount of loss in activity. the antibodies that had been elicited by the current vaccine may have worked very well against the original strain, or even the delta strain, but will work less well against omicron. >> reporter: what does that mean for the amount of time it could now take to be protected against this strain? is this. >> if the loss in vaccine efficacy were to be substantial, then companies will jump in to action to make new vaccine. that might require anywhere from three months on. there will be some delay. >> reporter: also new tonight, of "the washington post" reports that president biden is considering implementing a testing rule for americans returning from overseas travel, regardless of vaccination status. it could also include a requirement to self-quarantine for seven days, norah, even if you test negative. all of that reminiscent of early pandemic travel restrictions. >> o'donnell: yeah, that's a significant development. errol barnett, thank you so much. well, it was an emotional day at the sex trafficking trial of british socialite ghislaine maxwell. an accuser testified that maxwell's boyfriend, jeffrey epstein, abused her when she was just 14. cbs' mola lenghi has graphic testimony from the federal courthouse in manhattan. >> reporter: taking the stand as jane to protect her identity, the first alleged victim to testify in ghislaine maxwell's trial today said she was 14 and froze in fear during her first sexual contact with jeffrey epstein. she said she'd met epstein and max well in 1994, while eating ice cream at a summer arts camp in michigan, telling a packed courtroom, that maxwell befriended her, then would sometimes be in the room during sexual abuse that went on for years. "she seemed very casual, like it was normal," she said with maxwell just a few feet away at the defense table. "but it did not seem normal to me." jane fought back tears when she described flying from her gnome in palm beach to new mexico, where and maxwell said epstein wanted to see her. maxwell is charged with am groog underaged girls to be sexually abused by epstein. she denies the charges. maxwell's attorneys have sought to portray jane as someone out to collect money. earlier today, epstein's longtime pilot, testified he flew powerful men on epstein's private plain including prince andrew, kevin spacey, and donald trump. he said he never witnessed any sexual activity. he also testified that epstein introduced him to a young woman once they boarded, since identified as jane. he described her as a mature woman. she was a teenager at the time. >> o'donnell: and mola lenghi joins us now from outside the courthouse. i know you heard jane's testimony today. take us inside the room. >> reporter: well, norah, you could hear the discomfort in her voice as she testified, the sighs and deep breaths, at times getting emotional and sometimes sounding deflated, especially when she was recounting the more graphic details. the defense will condition their cross-examination of jane tomorrow, norah. >> o'donnell: and there is some breaking news that is just coming in tonight. cnn anchor chris cuomo has been suspended indefinitely pending an investigation into his involvement in the defense of his brother, then-new york governor andrew cuomo. andrew cuomo was forced to resign because of multiple sexual misconduct allegations and cuomo's suspension comes a day after explosive documents released by new york's attorney general revealed he was more involved than previously known. in a statement tonight, cnn says his involvement raises serious questions. all right, there are several key developments in the investigation into the deadly assault on the u.s. capitol. lawyers for former president donald trump today tried to convince a panel of judges that congress shouldn't get his records. the former president has ordered his staff not to cooperate, but his chief of staff today made a different decision. here's cbs' kris van cleave. >> reporter: a showdown in the courtroom today as lawyers for the former president tried to stop the release of his call records and handwritten notes from january 6. the judges sounded skeptical of the president's claim of executive privilege. >> this all boils down to who decides. why should the former president be the one to make that determination? >> reporter: the trump legal could be reviewdiduall the judges were not moved. >> please stop. please stop. >> what we have seen from the former occupant of the white house time and time again is delay. >> reporter: january 6 committee member california congressman peter agular said the documents could shet light on new reports mr. trump spent the hours before the capitol attack working the phones, talking to advisers about ways to stop the certification of president biden's election. >> this was a key focus on the president's mind at the time, and that he was working with his team in order to try to thwart the certification of the ballots. >> reporter: former trump white house chief of staff mark meadows agreed today to cooperate with the committee after snubbing the panel for months. >> no one in the west wing had any knowledge that anything like what happened on january 6 was going to happen. >> reporter: his change of heart comes after former trump adviser steve bannon was charged with criminal contempt for refusing to cooperate.n meadows' decision: tomorrow the committee is set to decide whether to seek a contempt charge against jeffrey clark. clark is a former d.o.j. official from the trump era who has not cooperated with the committee so far. today the forme president called the committee rigged. norah. >> o'donnell: sounds like things are heating up. kris van cleave, thank you. tonight we're taking a look at some of the desperate measures school districts are taking as they deal with severe staff shortages opinion the labor department says in september-- get this-- 30,000 public school teachers resigned. we get more on america's school staffing crisis from cbs' janet shamlian. >> so glad you're here! >> reporter: gel ortiz often supervises recess at barnum elementary school. it's not her only responsibility. >> i am principal, assistant principal, teacher, paraprofessional. i cover classes, lunch recess duty. i do everything that needs to be done. >> reporter: and in thirdad neeu gu to write t your blue n, please. >> reporter: she usually works in the district's main office. in the denver district, superintendent alex marrero tlls us everyone is doing multiple jobs. >> it's in droves that we're having absences. >> reporter: the pool of substitutes has plummeted amid covid fears from 1,200 to just 375, not enough to cover those out due to stress and illness. it's not just here in denver. burnout is fueling shortages of teachers and staff, like bus drivers and cafeteria workers, in schools all across the country. principal joseph uy vacuums his las vegas elementary because he's short on cleaning staff. he's also teaching. >> yes. on top of the tens column. mentally, physically, emergencily it's drank. good morning! >> reporter: the upcoming christmas holiday will offer a few days' rest, but it'sicism math: most of the academic year is still ahead. how are you going to make it through the rest of the school year? >> we're going to do what we have to do. we have to put our students first. say good morning! >> good morning! >> reporter: disrupting the return to normal, shortages that will likely outlast thepandem. janet shamlian, denver. >> villafrance: and we want to turn now to a cbs news investigation into the booming sales of illegal drugs on social media. we found that teens can easily get their hands on narcotics, including fake fentanyl pills, and the consequences can be deadly. the u.s. for the first time just had more than 100,000 fatal overdose in a 12-month period. cbs' tom hanson has our investigation. >> chase was wise beyond his years. he was passionate. he was curious. >> reporter: last winter, megan macintosh found her 18-year-old son, chase, unconscious after experimenting with pills. she turned to his snapchat account for answers. >> big bags of pills, mushrooms. i felt really help lts when i saw how prevalent it was. >> reporter: just over one month later, he died, likely from a fake pill laced with fentanyl from an unknown source. if you could talk to chase today, what would you say to him? >> "i love you." "you have no idea how much i love you." i think social media can be great, but it also has a really dark side to it. >> reporter: kathleen miles, with the center on illicit networks and transnational organized crimes, says the drug trade is booming on social media and with fentanyl in high circulation, the risks are often deadly. i'm starting a new account, and i'm a teenager, how many degrees away from a drug dealer am i? >> in my experience, two. >> reporter: cbs news asked miles to create two fake profiles across instagram, snapchat, and tiktok, claiming they were 18 but publicly identifying as high school students. one was actively searching for drugs. >> i just messaged, "hey, do you have xanax?" >> reporter: and within just 48 hours, found an apparent dealer. the second account used different hash tags like... >> depression, sad, anxiety. >> reporter: while all three platforms provided some mental health resources, posts about marijuana and cigarettes also appeared on instagram. >> by the third day on instagram, we were fully immersed into drug culture. >> reporter: who bears the responsibility? >> it's the tech companies. since they aren't liable, they're not creating the guardrails needed to keep our kids safe. >> reporter: guardrails that macintosh says need to start at home. >> it was my kid, and it's going to happen to someone else's kid. if you can approach your kid in this kind of, like, soul way-- like, "let's have an honest conversation about why, how, and what we need to do as a family to keep you safe." >> reporter: now, snapchat told us they are determined to do their part to eradicate drug sales. instagram told us they will continue making improvements to keep young people safe, and tiktok says nearly 96% of drug-related videos are removed from their platforms. norah, all three companies say they are using technology to actively remove this content. >> o'donnell: tom hanson with such an important investigation. thank you. and still ahead on tonight's "cbs evening news," why a spacewalk had to be postponed today. and nine months after his horrendous car crash, tiger woods holds a press conference. what he says about him just being glad to be alive. 92% saw visibly firmer skin in just 4 weeks. neutrogena® for people with skin. trelegy for copd. 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