. gnats for us at 5:00 p.m. we will see you back here at 6:00 p.m. for a full hour of news. >> news updates always on www.cbssf.com. see you in a bit. >> quijano: another deadly train crash. an amtrak passenger train slams into a freight train in south carolina. it's the third major wreck in less than two months. >> it was horrendous. >> quijano: also tonight, will democrats get to relea rebuttal to the controversial republican memo alleging anti- trump bias? >> we're not done! we're not done! >> quijano: it's super bowl game day, we're in minneapolis for football's biggest night of the year. >> i've been waiting for this forever. >> quijano: a club drug known as "special k" is now being used to treat severe depression. >> ♪ i never meant to cause you any sorrow ♪ >> quijano: and it's raining purple-- prince's piano, pants, and boots are among his personal items going up for auction. >> ♪ purple rain

purple rain ♪ this is the "cbs weekend news." >> quijano: good evening, i'm elaine quijano. for the third time in less than two months federal investigators are at the scene of a deadly crash involving an amtrak train. the latest wreck happened early this morning in cayse, south carolina, across the river from the state capitol, columbia. a passenger train believed to be on the wrong track plowed into a freight train killing at least two people and injuring more than 100. kris van cleave has the latest. >> reporter: early indications are amtrak train 91 was traveling at about 59 miles per hour when it hit a c.s.x. freight train around 2:30 sunday morning near columbia, south carolina. on board the new york to miami train, were nearly 150 passengers and crew. the 54 year-old engineer michael kempf of savannah, gerogia and 36 year-old conductor, mike cella of orange park, florida

were both killed when the lead locomotive and several of the passenger cars derailed. >> think of the worst car wreck you've ever been in. that's what it sounded like. >> reporter: derrick pettaway was sleeping on board when the accident happened. >> i wasn't able to embrace myself properly. i ended up going into the wall and kind of gave myself a bump on the head, nothing too major. >> margaret fisher is a lexington county coroner. >> we should've had a lot more casualties but we didn't. >> reporter: 116 people were taken to the area hospitals with a range of injuries. the national transportation safety board is now on scene and investigating the crash, as well as switch equipment that may have put the amtrak train on the wrong track. chairman robert sumwalt. >> the key to this investigation is learning why that switch was lined that way. >> reporter: south carolina governor henry mcmaster toured the crash site. >> the first engine of the freight train, of course, was torn up and the single engine of the passenger train, the amtrak train, which was headed south was barely recognizable.

it is quite a-- quite a crash. >> reporter: investigators are still on scene, they have been able to get their hands on the amtrak train's forward-facing video camera, that video is being sent to washington. the train right there, you can see the force of this collision completely knocked some of the passenger cars off the tracks. this is the third fatal amtrak accident the n.t.s.b. has begun investigating since december, elaine? >> quijano: kris van cleave, thanks. for more on this we turn to former n.t.s.b. chairman and cbs news transportation safety analyst mark rosenker. mark, this is the third amtrak related accident in two months. does the company have a safety problem? >> absolutely, elaine. three accidents in 60 days, this is absolutely unacceptable. and things need to change. this is america's national railroad. passengers are entitled to clean, efficient, safe transportation.

>> quijano: well, you were chairman of the n.t.s.b. in 2008 when positive train control technology was mandated. the safety feature can help stop a train before an accident. why has there been such a delay in getting this installed? >> this has been one of the great disappointments to me because i thought we had solved this problem with the railroad safety improvement act of 2008, requiring class one railroads to install positive train control by the end of 2015. that was seven years of possibilities of getting this technology put into affect. they only had the class one railroads about less than 20% of the tracks complete by the time that deadline occurred. so the railroads went to congress and said that they're not going to be able to operate unless they get an extension. the congress caved in, gave them that extension and people died as a result of that over the

past year or two. >> quijano: all right, mark rosenker, thanks very much mark for your time. the house intelligence committee is expected to vote tomorrow whether to release the democrat's rebuttal to a controversial republican memo released friday. republicans accuse officials at the f.b.i. and justice department of anti-trump bias and surveillance abuse. the president weighed in again today from florida and errol barnett is there. >> reporter: feeling vindicated by the house g.o.p. russia probe memo, president trump quoted a "the wall street journal" editorial. >> reporter: but the president excluded this warning. >> i am on record as saying i supported bob mueller 100%. >> reporter: congressman trey gowdy the only republican house intelligence committee member to

review the memo's underlying materials still sees justification for the special counsel's investigation. >> you need an investigation into russia. you need an investigation into trump tower and the cambridge analytica email separate and apart from the dossier. >> the investigation didn't begin with carter page. >> reporter: adam schiff, the committee's top democrat says despite concerns over surveillance of the trump campaign advisor, evidence shows another member of the campaign triggered the probe. >> it actually began with george papadopoulos, someone who was a foreign policy advisor for candidate trump and someone who was meeting secretly with the russians and talking about the stolen clinton emails. >> reporter: schiff pushed for the democrats memo to be released along with the g.o.p. version, but was rebuffed. republican committee member will hurd explains why. >> there was some references to ongoing intelligence priorities. i believe they are working through that and, and it's going to-- we're going to vote on it. >> reporter: if the house intelligence committee votes to release the democratic memo,

president trump then decides if and how it should be made public. portions could be redacted or it could be kept under wraps entirely, elaine? >> quijano: errol barnett, thanks. football's biggest night of the year is finally here. jamie yuccas has the latest from super bowl central in minneapolis. >> reporter: football fans lined up long before kickoff to pick up their once-in-a-lifetime tickets. >> wow. >> i've been waiting for this forever, and this is going to be our game. >> reporter: it's the toughest ticket in sports. made even harder when it's fake. joe asaro runs security for stub hub. >> we check for security features on every single ticket we touch, we never had a counterfeit ticket go out of this office. >> reporter: never? >> never. >> reporter: and hopefully today will be the same. >> there is no hoping in this situation. >> reporter: the game caps a week of events and attractions in downtown minneapolis like this zip line across the mississippi river. wo!

while temperatures have dipped into the single digits, the game is expected to be the coldest on record. >> we're not done, we're not done, we're not done! >> reporter: patriot fans who braved the weather are looking for their 6th super bowl title. an eagle's win will be the team's first ever. >> did i miss the super bowl? >> no, no. >> reporter: the team saw this video of fan haley parks in new jersey right after she had her wisdom teeth removed and offered her two tickets. >> who do you want to win? >> the eagles, so bad. >> okay, they'll play on sunday. >> can i go? >> reporter: while 65,000 fans are watching the game, 60 police agencies, and 1,700 federal agents will be working together on the ground and in the air to secure it. fans were asked to get to the stadium four hours before kickoff to get through all the security procedures. stub hub says this super bowl is providing record-breaking sales with tickets ranging anywhere

from $2,400 to $20,000 a piece. jamie yuccas, cbs news, minneapolis. >> quijano: disgraced movie mogul harvey weinstein is fighting back against new allegations of sexual misconduct. actress uma thurman this weekend accused weinstein of trying to force himself on her years ago. here is mireya villarreal0. >> now i want to dance, i want to win, i want that trophy. >> reporter: "pulp fiction"'s 1994 debut catapulted uma thurman's career in hollywood. the movie's success led thurman to reunite with director quentin tarantino and executive producer harvey weinstein for "kill bill" volume 1 and volume 2. her role as beatrix kiddo, a strong powerful woman was box office gold that brought in more than $300 million. but behind the scenes thurman is now revealing in a new york times article the relationship with harvey weinstein had become toxic.

thurman accuses weinstein of attacking her years ago at a london hotel. when accusations against weinstein first broke in october, thurman initially stayed silent in late november she wished instagram followers a happy thanksgiving but cryptically included "except you, harvey, and all your wicked conspirators." a spokeswoman for harvey weinstein released a statement saying weinstein considered thurman a colleague and a friend. he acknowledges making an awkward pass 25 years ago after misreading her signals. but follows by saying her claims about being physically assaulted are untrue. in a statement to cbs news harvey weinstein's attorney accuses uma thurman of embellishing what happened and says they will carefully exam

and investigate her statements to the "new york times" to decide whether or not to take legal action against her. elaine? >> quijano: mireya villarreal, thanks. now some other stories we're following in the cbs weekend newsfeed. a san francisco police officer is recovering after being run over last week by a robbery suspect. video show the suspect backing up his car and running over the officer and another suspect. both survived. other officers on the scene drew their guns but did not shoot as the car drove away. the police officers' union says guidelines that prevented the officers from shooting are putting their lives in danger. space-x is counting down to liftoff for its "falcon heavy" rocket. its basically three reusable rockets bolted together. the "falcon heavy" weighs more than 3 million pounds and stands nearly 230 feet tall. the middle booster will launch a car, a tesla roadster into orbit towards mars.

the test launch is tuesday from the historic cape canaveral pad used in the apollo missions. and it will be raining purple this week at an auction of prince memorabilia. the legendary singer's purple piano, pants, and boots are among dozens of items going up for sale. the online auction begins thursday. ♪ ♪ coming up, health experts urge facebook to pull the plug on its new messenger kids app, and later, a drug some used to get high is showing promise to treat severe depression. i take medic high blood pressure and cholesterol. but they might not be enough to protect my heart. adding bayer aspirin can further reduce the risk of another heart attack. because my second chance matters. be sure to talk to your doctor before you begin an aspirin regimen. i wanti did my ancestrydna and where i came from. and i couldn't wait to get my pie chart. the most shocking result was that i'm 26% native american.

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on your face and it's a really good app for kids. >> reporter: the six year old's father brett thomason signed her up. thomason, a technical coordinator at a charter school in sarasota, florida, likes the fact that parents control who their children can talk to. >> that even creates a safer environment than traditional text messaging that all you need is a phone number and you can send a message to anybody and there are no blocks or anything with that. >> reporter: messenger kids has to be set up through a parent's facebook account because children under 13 are still not allowed to have their own. the app which was created with the help from child development experts has no buttons for sharing, commenting, or liking posts. a facebook spokesperson told cbs this morning: >> really what it is doing is indoctrinating much younger kids on to social media when their friendships should be off line and face-to-face.

>> reporter: josh golin executive director of the campaign for a commercial-free childhood says elementary school students should not be exposed to the harmful effects of social media. he cites studies linking it to increases in depression, suicide rates, and body image issues. >> we wrote this letter because facebook is the world's largest social media company and by them going after young children and trying to get them on social media, it's going to be a game changer. >> reporter: josh golin feels so strongly about keeping children off social media that he took the wait until 8th pledge, which encourages parents not to give their kids smartphones until the 8th grade, jericka duncan, cbs news, new york. >> quijano: still ahead, the club drug researchers say is showing promise for treating severe depression. y people are fighting type 2 diabetes... with fitness... food... and the pill that starts with f. farxiga, along with diet and exercise, helps lower blood sugar in adults with type 2 diabetes.

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>> quijano: an old drug is offering new hope to people who suffer from severe depression and suicidal thoughts. paula reid looked into this promising treatment and its risks. >> reporter: anne stalling says she has been battling severe depression for most of her life. she tried anti-depressants and even electroconvulsive therapy but nothing worked until she came to this potomac maryland clinic and tried ketamine.

>> it was the fifth treatment in and i was coming home from the grocery store, and i was like wow, this is how you don't feel depressed. >> reporter: ketamine was approved by the f.d.a. in the 1970s to sedate patients during medical procedures. it's more commonly known as an animal tranquilizer and in powder form as "special k." a club drug used to get high. today ketamine is being provided legally off-label to treat depression at an estimated 250 clinics across the u.s. doctor steve levine offered intravenous ketamine infusions at several clinics around the country as an alternative to common anti-depressants. >> everything for the past 50 years has been based on the chemical imbalance theory of depression which has never held water. so all of these medicines while they do help a lot of people are based upon a flawed theory. and that is probably one of the reasons why they do take so long to work.

>> reporter: stallings didn't have time to wait. she had an especially hard time over the holidays and when her father got sick, she thought about taking her own life. >> reporter: so you had suicidal thoughts, you got an emergency prescription for ketamine, and after that appointment, your suicidal thoughts are gone? >> yes, gone. >> that is in line with what columbia university discovered in one of the largest studies yet on ketamine. researchers found the drug was significantly more effective than a commonly used sedative in reducing suicidal thoughts in depressed patients. the effects lasted up to six weeks. for decades, dr. gerry sanacora has been studying ketamine at yale. he says the drug is not addictive in the way opioids are, but could still be harmful in the long run. >> there is at least evidence in animal models that these type of medications can actually cause some structural damage in the brain, that's usually at higher doses, usually at longer term exposure, but we don't know where that level is.

>> reporter: but for anne stallings, despite the unknown, she is contented with a chance to feel normal. >> if i can live a quality, happy life, and be productive, be able to get to work, to be able to have my family, to enjoy life, not walk through life but enjoy life, then it's worth it. >> reporter: paula reid, cbs news, potomac, maryland. >> quijano: up next for this super bowl star, the biggest battle is off the football field. n to treat her frequent heartburn... lucy could only imagine enjoying a slice of pizza. now, it's as easy as pie. nexium 24hr stops acid before it starts for all-day, all-night protection. can you imagine 24 hours without heartburn? i tabut with my back paines, i couldn't sleep and get up in time. then i found aleve pm. aleve pm is the only one to combine a safe sleep aid plus the 12 hour pain relieving strength of aleve.

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be sure to talk to your doctor before you begin an aspirin regimen. >> quijano: we end tonight at the super bowl where the biggest challenge facing nate solder of the new england patriots is not the hard charging philadelphia eagles. solder has tackled an even greater challenge off the field, and now he's helping his son do the same. here's mark strassmann. >> reporter: nate solder plays left tackle for the new england patriots, one of tom brady's body guards on the team's offensive line. he's massive. six-foot-eight, 320 pounds, but cancer has blindsided him twice.

>> you think it's something that older people get and people that smoke cigarettes and that sort of thing. and it's not the case at all. >> reporter: in 2014, solder had surgery for testicular cancer and kept playing. the next year, cancer really hit home for solder and his wife lexi. hudson their first child was three months old. >> we're giving him a bath. we felt a lump on his left side which felt weird, you know. we had never noticed it before. >> reporter: hudson had a rare kidney cancer. >> he had tumors in both kidneys and then in each kidney, he has multiple tumors. >> emotionally we were like bankrupt. >> reporter: a year of chemotherapy shrank hudson's tumors, but three months ago they started growing again. which means the two-year-old is back on chemo. >> reporter: it is just like is this ever going to go away? >> yeah, we have faith that it will get better. i totally believe he will be okay. >> reporter: when the patriots

won their fifth super bowl last year, hudson was in houston. it's the n.f.l.'s ultimate moment, but not solder's, not anymore. >> before, my biggest stress, my biggest worry, all my concerns were coming from football. and now football is a way that i can release from a lot of the stresses in life. >> reporter: your job is to protect tom brady. >> right. >> reporter: you'd do anything to protect your son from this. >> yes. >> reporter: it's got to be humbling. >> yeah, cancer really doesn't matter who you are, it knocks anyone out. you realize that we're all human beings. and we all struggle and we all have these battles that we have to go through. >> reporter: for the solders, hudson's battle could redefine the meaning of winning. mark strassmann, cbs news, foxboro, massachusetts. >> quijano: we wish the solder family the best. that's the "cbs weekend news" for this sunday. later on cbs, "60 minutes." i'm elaine quijano in new york. for all of us at cbs news, thank you for joining us and good night.

captioning that burned during october's our first glimpse at the cause of two small fires that burned during october's devastation in the north bay. the blazes sparked by a combination of high winds and power lines. >> plus new, we are getting a first look at an advertisement supporting san francisco candidate set to air tomorrow. i'm juliette goodrich. >> the group is angry at the way they're ousted from the mayor's office. the video that will start appearing online in a few hours. >> it felt like it was finally our time. >> a new group called it's our time is fewer russ how she was removed from her position just two days after the women's march. starting tomorrow

they'll run this ad online. >> there are allegations tonight in the selection of san francisco's new interim mayor. >> you mean this guy could have had a deal with these guys that helped this guy campaign for mayor. >> any truth to them? >> i don't want to comment on that. >> andrea shorter says the supervisors schemed to get her out of the mayor's office. >> she is someone who has a popularity, she has a clear vision and she's a strong leader. >> hillary ronan says she supports women of color but she can't supports bray. >> those same white men and