this nightline. >> tonight, new details and video of the las vegas cybertruck explosion. >> it ultimately appears to be a tragic case of suicide involving a heavily decorated combat veteran who is struggling with ptsd and other issues. >> what we're learning tonight, where the elite soldier went

before a parking outside the trump international hotel. >> tesla did provide and helped our team and the new clues. >> authorities say they found on his phone. plus, the return of y2k fashion. i did it again. oops. they're doing it again. from blake lively wearing britney spears iconic dress to kendall jenner's paris hilton throwback. stars and influencers breathing new life into vintage looks. i don't think you're ready for this. >> my body too. >> bootylicious challenges beyonce's mom tina knowles face dressing the bootylicious destiny's child. >> i usually told them that one day you will be begging to dress them and dry. >> january. >> where am i? dry january. >> people at more young people making the choice to go booze free. sharing online. >> it's a moment for us to readjust how we culturally look at alcohol. >> the trend for some, becoming a lifestyle. tom holland tells jay shetty i was the happiest i've ever been in my life. and

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pete g. writes, "my tween wants a new phone. how do i not break the bank?" we got you, pete. xfinity mobile was designed to save you money and gives you access to wifi speeds up to a gig. so you get high speeds for low prices. better than getting low speeds for high prices. right, bruce? -jealous? yeah, look at that. -honestly. someone get a helmet on this guy. xfinity internet customers, ask how to get an unlimited line free for a year, plus a free 5g phone. been saved. >> by. >> good evening. thank you for joining us tonight. new information and video capturing the decorated soldier who died this week in a fiery cybertruck explosion in las vegas. authorities finding explosives and combing through his disturbing writings, saying he was intent not just on ending his life, but in sending a

message. here's abc's mola lenghi. >> it was an explosion that rocked sin city on new year's day. now, newly released images and details emerging from authorities shedding light on why a highly decorated green beret blew up a rented cybertruck and took his own life in front of the trump hotel in las vegas. police saying 37 year old matthew berger, left, notes on his cell phone, stating that his actions were a wake up call to america. >> in there, you can read a couple of the excerpts. we are the united states of america, the best country people to ever exist. but right now we are terminally ill and headed towards collapse. this was not a terrorist attack. it was a wake up call. americans only pay attention to spectacles and violence. what better way to get my point across than a stunt with fireworks and explosives? >> investigators say the notes on his phone providing clues to a possible motive. >> why did i personally do it? now i need to cleanse my mind of the brothers i've lost and relieve myself of the burden of the lives i took.

>> master sergeant berger was on approved leave from his base in germany when he rented this cybertruck from the turo app on december 28th in denver. investigators tracing his movements from colorado to new mexico to arizona through tesla charging stations, releasing these new images showing him at a tesla charging station in kingman, arizona. >> tesla did provide and help our team be able to recover the thumb drive that records other types of data to include video by the tesla, and also parking the cybertruck in las vegas. you're going to see some descriptive, descriptive clothing that matches some of the other video that we've recovered along the route. >> the army special forces master sergeant pulling into the trump international hotel valet at 735 wednesday before pulling out, returning an hour later, and then just 17 seconds after pulling in the explosion, flames tearing through the vehicle. police saying he shot himself in the head. at least seven people were injured. police identifying berger by his distinctive

tattoos. you can see a tiger tattoo inside that burned out truck. police also uncovering two semiautomatic weapons and canisters of gasoline, camp fuel and large firework mortars. police say berger's passport and wallet, which contained his military id, were also in the vehicle. investigators are also looking at reports that berger appeared on a reality tv show on the history channel, the ultimate soldier challenge, under the name matt berg inside edition, sharing video from 12 years ago showing the elite soldiers. >> so the question is, if we knew of a alias of matthew berg and he had been previously on a television show, we've seen that reporting but have not verified that reporting. >> sources say berger was divorced and had recently remarried, his wife reportedly telling authorities he'd been out of the house in colorado springs since christmas following a dispute over allegations of infidelity. investigators scouring the suspect's background, fbi and local police searching this

townhome in colorado springs. neighbors stunned. >> he seemed normal. his wife is very nice. they just had a baby. >> and while investigators say they found those notes railing against the condition of the united states, they say the hostility was not directed towards president elect trump. >> through these interviews, we've found that the subject held no animosity towards the president elect. >> instead, authorities pointing to an all too common trauma. >> this incident is more public and more sensational than usual. it ultimately appears to be a tragic case of suicide involving a heavily decorated combat veteran who is struggling with ptsd and other issues. >> our thanks to molly. if you or someone you know is struggling with thoughts of suicide or other mental health crises, free, confidential help is available 24 hours a day, seven days a week. call or text the national lifeline at 988. we

turn now to y2k fashion. having another moment. whether you were rocking the shiny pants and sparkly shoes yourself, or just dazzled by the throwback clips all over social media. the iconic looks of the early aughts are all over, all over again. here's abc's morgan norwood with another look. how are you doing? >> they say everything old is new again. fashion is no exception. >> from main street, i bought the exact dress that miss paris hilton wore to the 2003 teen choice awards, and i just got it. >> to main stage. blake lively rocking britney spears versace dress from 2002. and kendall jenner paying homage to paris hilton's emblematic birthday dress. ice spice and a tracksuit reminiscent of the unofficial uniform of the early aughts. >> this is my first ever juicy bag that i thrifted. >> people everywhere bringing new life into old classics from

a bygone era known in pop culture as y2k. >> they're wearing a lot of, like, authentic y2k clothes. i'm seeing a lot of layering some dresses over jeans. all these things are coming back into rotations. >> emulating some of the coolest looks of the time has come full circle, and i'm really happy and pleased to know that, you know, i had some kind of effect on fashion because this is my life, i love fashion. an era that earned its spot as a pillar of modern fashion. >> how do you keep cranking out the great outfits? i just be wearing overalls and jeans by now. >> oh, you know, and i see that coming in the near future, too. i totally do. >> three. two. one. happy 2000. >> the year 2000, shortened as y2k, was a theory that there might be a technological apocalypse, as computer calendars change from 1999 to 2000. >> on new year's day 2000. is it possible that we're in for an international disaster? >> and the clock struck midnight. but the much feared

apocalypse never was. >> the y2k doomsday once predicted has not yet materialized. set the scene for me. >> i think it's like 1998 to 2002. just that kind of encapsulated time period, fantasizing what space outfits would look like. >> that intergalactic fashion fantasy famously flaunted by a young raven-symone in the disney channel original movie zenon girl of the 21st century. >> cetus. lupeedus. there's a ship set to be launched tonight. >> raven, one of y2k s it girls, went on to star in her self-titled show. that's so raven. >> could that be raven baxter? >> what do you recall as your most iconic look? >> the first one i'm going to say is a jean suit. that was a big one. a green embroidered jacket, which was the title outfit for that. so raven and then cheetah girls, because we are sisters, we stand together.

>> and in destiny's child's chart topping record, survivor. survivor. i'm not gon give up. >> i'm not gonna stop. i'm gon work harder. >> survivor is my song. it's like, probably my favorite song that destiny's child ever did. >> tina knowles is a bona fide curator of y2k fashion, the genius behind destiny's child's greatest looks. >> we have a wonderful stylist, tina knowles, who always dresses destiny's child in nothing but the best. >> one of the favorite things that i did, they wore these black leather corsets that we made from scratch, and a lot of work went into them. we wanted them to cross over and go into pop and not just be r&b singers. destiny's child, and they said they just need to be in some jeans and t shirts like everybody else. and thank god we didn't listen. >> okay, let's try it on. >> content creator aaron miller, nsync fan. >> yeah, i thought you were too. >> donning vintage garments. you heard that right. y2k is

officially vintage. >> this is how i dress. i'm a rock chick, mom. >> i think that gen z. they probably feel like they missed out on y2k fashion because some of them were not born, so maybe it's a little bit of a novelty for them. >> but as y2k fashion returns, with it comes a reevaluation of the beauty standards of that time. i heard loud and clear in america's next top model, she needs to lose 5 to 10 pounds. >> i hate it. they're all fat. >> the entire room is fat. >> i'm fat. you're all fat. >> when i was younger, it was at the forefront of my mind because the covers of magazines would be all about dieting and exercises, which is just crazy to witness when you're like a young teen. >> being thin was very important at that time, and if you weren't thin, you were fat. there was no such thing as thick. i can't get into a sample size. i like cheese grits. people that put the clothes on and the people that were on my team made to

feel a lot thicker than everybody else, which opened the door to a lot of different other things. like i had other types of body surgeries, lipo and a tummy tuck and all kinds of stuff. >> never really helped because i always gained weight afterwards. >> i think i'm just supposed to be a thicky. >> back in the 2000, it was all about that one esthetic, especially for african-american women. >> we have curves. and so to celebrate those curves, i was so happy about it because i was told a lot of times that, you know, that they need to lose weight. oh my god, no. i mean, i remember them getting a grammy and it still being really hard for me to get clothes for them. no, she is too curvy, she's too short. she's too. it was amazing the things that they said to me. >> and how did you navigate that? i mean, hearing those things about your girl told them to kiss where the sun doesn't shine and that one day you will be begging to dress them. >> destiny's child went on to break records, each member easily recognized by their

individualized yet in-sync styles on display in their body positive anthem bootylicious. i don't think you're ready for this. >> my body too bootylicious for you, babe. >> why do you think y2k fashion is making this comeback now? >> i think these young people are doing a damn thing. they're unapologetic. they like what they like. they don't really worry about what somebody's got to say about it. to see these young kids really appreciating and acknowledging what an effect that had on fashion is just i mean, i get emotional about it. >> hi, i'm raven from that's so raven and you're watching disney channel. >> did you ever imagine that so many years later, people are still looking back at your looks and recreating them? listen, i am humbled and amazed and it brings me joy to know that it's influenced a new generation. and

i hope you wear it better. >> is there this pause that maybe we should hold off on bringing those toxic beauty standards back? >> girl, they're still here. they all still here. >> they're just in different ways. bring it back. let's see how we act this time. maybe we learned from our mistake. but for the new generation. they're out here. you be out here, boo boo. i'ma support you 100% because you're paving the way for someone else. >> our thanks to morgan when we come back dry january and its health benefits. why? the nation's leading public health spokesperson says it's more spokesperson says it's more important than ever to quit the . ♪ good to go binge-watch. ♪ good to go out even later. ♪ with cabenuva, there's no pausing for daily hiv pills. for adults who are undetectable, cabenuva is the only complete, long-acting hiv treatment you can get every other month. it's two injections from a healthcare provider,

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>> welcome back. whether you call it dry, sober or alcohol free, giving up booze is clearly having a moment this dry. january. according to the cdc, 1 in 6 adults binge drink about once a week. but a growing number of people are making the decision to forgo alcohol. health experts say they're on to something now more than ever. here's abc's will ganss with another look. >> i know it feels like dry. january is everywhere with people getting candid on tiktok, where am i? >> dry january people at. >> this is my first ever time doing dry january. and like i am actually struggling. >> and mixing mocktails on social media. >> so dry january. the idea behind it is simply reevaluating your relationship with alcohol and taking a break from it. i think so often we don't realize how alcohol is associated with so many of our social events, so many of our daily life activities. it's a moment for us to readjust how we culturally

look at alcohol. >> but it's not just trending on social media. for some, it's become a lifestyle change. celebrities like tom holland telling jay shetty how doing dry january led him to a sober lifestyle year round. >> i decided to just give up for january. i just wanted to do dry january and all i could think about was having a drink. if i can do six months without alcohol, then i can prove to myself that i don't have a problem. and by the time i had got to june 1st, i was the happiest i've ever been in my life. >> pretty little liars star lucy hale marked the start of this month by sharing her sobriety journey on instagram. no matter why people decide to abstain, medical doctors say that taking a break from booze has immediate health benefits. >> many people don't realize that they might be participating in binge drinking, having more than 3 to 4 alcoholic beverages in one experience, and that directly affects your sleep that night, but also your health in the long run, your gastrointestinal health, and then so on and so forth. your

risk of cancer. >> just today, the u.s. surgeon general issuing an advisory outlining the direct link between alcohol consumption and cancer risk and calling for the health warning labels on alcoholic beverages to be changed. but that would require approval by congress. >> my message to individuals is just to recognize that when it comes to alcohol and cancer risk, less drinking means less cancer risk. >> alcohol consumption is the third leading preventable cause of cancer, behind smoking and obesity. according to the surgeon general, leading to increased risk for things like breast cancer and cancers of the colon, liver and mouth. from daybreakers early morning raves where people trade in bottomless brunch for beats, to bars where booze isn't even on the menu, companies are cashing in two stars, releasing nonalcoholic products like katy perry's booze free beverage line day. what a great time for blake lively's seltzer buds. >> let them know how good it is. >> i think it's five pallets.

>> i thought i ordered six. >> and tom holland's nonalcoholic beer company bureau more and more are embracing life without alcohol. congratulations. your first dry january. how's it going so far? >> it's going good. it's going very dry. >> last year i caught up with austin burton as he was posting his journey on tiktok. >> it's not because i have a drinking problem by any means. i just have a problem with what comes with drinking. my recovery is off, sleep's off and just my mental game is a little slower than usual. and so i just wanted to take a break from it all. it wasn't necessarily like, okay, i'm going 100% sober, but let's just see what happens when i can take a break and do something for myself. my own decision. and i haven't really looked back since. >> he had decided to stop drinking months earlier, but used dry january to keep that momentum going. and austin isn't alone. in fact, 28% of college aged adults are going booze free entirely. >> i just want to keep going and

see where this where this takes me. i had no idea there were so many people doing it. it's a movement. it's something. and people are are really into it because of that. >> our thanks to will when we come back, two years after nearly losing his life in a catastrophic accident, jeremy renner celebrates his second renner celebrates his second rebirth day. why? he says he'll colitis symptoms e can keep coming back. start to break away from uc with tremfya... with rapid relief at 4 weeks. tremfya blocks a key source of inflammation. at one year, many people experienced remission... and some saw 100% visible healing of their intestinal lining. serious allergic reactions and increased risk of infections may occur. before treatment, your doctor should check you for infections and tb. tell your doctor if you have an infection, flu-like symptoms or if you need a vaccine.

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>> finally, jeremy renner remembers those who made every one of his new years possible. jeremy renner is full of gratitude. two years after his near-fatal snowplow accident, the actor this week posted on instagram a photo of himself surrounded by the medical team that helped him recover. ringing in my second rebirth day today, he wrote in the caption. i send out my love, respect and gratitude for the army of people that it took to put me back together again. thank you to each and every nurse, doctor, first responder. i literally owe you my life. two of the most powerful words in the english language. thank you. that's nightline for this evening. catch our full episo