tonight, fiery act of defiance. protesters set their damp ablaze as police move in. a dramatic end to a standoff that's captivated so many. hostile homecoming. angry crowds erupt, confronting republican members of congress across the country. amazing discovery. stunning announcement from nasa. seven earth-like planets. are we the closest yet to finding life beyond earth? was a killer caught on camera? two teenage girls found dead and police say what's on their phone could help catch their killer. heartburn and acid reflux medicines, dangerous complications when patients don't follow

and fit for a princess. diana's collection, a dazzling new display at the palace. >> announcer: from headquarters in new york, this is "nbc nightly news" with lester holt. fiery and final act of defiance in the frozen north dakota encampment where protesters have held their ground for months are being removed tonight. police moving in late this afternoon peacefully arresting some of the last holdouts, closing the protest encampment for good. but not before protesters set massive fires, in a parting act of rebellion. blake mccoy is there tonight and has the latest. >> reporter: law enforcement in north dakota moving in. beginning to arrest the remaining protesters, refusing to clear the dakota pipeline access camp ahead of today's deadline. earlier, protesters

and dwelling. some left voluntarily while about 100 defied orders to leave. >> we'll be peaceful in prayer, psalm and ceremony. >> reporter: protesting the controversial multibillion dollar pipeline running nearly 1200 miles from north dakota to illinois and could be complete as early as next month. state officials set today's deadline to clear the camp ahead of spring flooding. >> we want to prevent any environmental or ecological disaster occurring from everything we see behind us here washing away in the missouri river. >> reporter: opponents argue an oil spill would cause an even bigger environmental disaster, contaminating tribal water supply from the missouri river and destroying sacred burial sites. tonight, as they're forced out -- >> the world is waking up into seeing what's going on here. >> reporter: they are not conceding defeat. nine people have been

with nightfall now approaching it remains to be seen whether police will move further into the camp and make more arrests tonight. they have expressed concern that they don't know what they're walking into. lester? >> blake mccoy in north dakota tonight. thank you. hostile homecoming continues for republican members of congress. being confronted by angry constituents at town halls across the country. americans who are worried and venting their frustrations, at times, in pretty dramatic fashion. the white house, however, is accusing them of being infiltrated by so-called professional protesters. nbc's peter alexander has details. >> reporter: tonight, an uproar in arkansas. the latest in a series of fiery, in your face confrontations. >> obamacare. improve it. >> reporter: for many republican lawmakers, at townhalls nationwide, a hostile homecoming. constituents demanding answers on health care, taxes and immigration. >> it's not all a

one-size-fits-all government solution. you ought to know better than that. >> reporter: senate's top republican, mitch mcconnell, dismissing the outcry. >> i always remind people, winners make policy and losers go home. >> before getting an earful of his own. >> these coal jobs are not coming back and now people don't have the insurance they need because they're poor. >> in rural virginia. >> what are you talking about? you're insane! >> reporter: backlash for tea party favorite dave bratt, who rode a wave of anger into office in 2014 and now faces one. >> obamacare has collapsed. >> reporter: overflow crowd of mostly democrats rallying outside. is this a metaphor for america, what we witness in this room? people screaming and yelling at you. >> the tension level is huge. we need to relieve the anxiety. and part of what will relieve the anxiety is when you get the economy growing. >> reporter: the president remains unimpressed, mocking so-called angry crowds, insisting many are planned out by liberal activists. these protesters dispute anyone was paid.

gaining traction. the pressure now mounting on other lawmakers to show up. [ crowd chanting ] in california, activists attacking republican paul cook, slapping "missing" stickers on milk cartons. lawmakers running the gauntlet, wondering whether this is an isolated moment or the start of a movement. peter alexander, nbc news, blackstone, virginia. the trump administration indicated today it's set to make a big u-turn in the area of transgender rights, changing course from president obama's position on whether or not they're protected by federal law. it could have far-reaching consequences, including the fight over transgender kids and the bathrooms they use in schools. our justice correspondent, pete williams, explains. >> reporter: a big reversal, slowing the push for transgender rights that zoomed ahead under president obama. the federal government

directive that just last may told public schools to let children use bathrooms that match their gender identity. that would be a blow to this woman who has a transgender child. >> he deserves to go to school every day and feel safe and be affirmed as who he is. >> reporter: the government now says a federal law called title ix that bans sex discrimination in public schools does not apply to transgender children because gender identity isn't the same as sex. it's a victory for a dozen states that sued to block the obama order. >> you don't want to be intermingling the sexes, young boys, young girls on school trips, school locker rooms, school showers. that's clearly a violation of privacy. >> because of the justice department's legal u-turn today, the government will probably also drop its challenge to north carolina's bathroom law that cost the state millions in lost business. when that lawsuit was filed, oba

attorney general, loretta lynch, had the emotional message for the transgender community. >> we see you. we stand with you and we will do everything we can to protect you, going forward. >> reporter: the move could also undercut the case of a virginia transgender student, gavin grim, coming to the supreme court next month. both cases were based, in part, on the obama administration's reading of title ix. back in boston -- >> we can't give equal access to students in schools what's going to happen to all the public access laws that are out there? >> also tonight the white house says that president trump's revised executive order, restricting travel from seven muslim countries won't be coming out until next week. the earlier one has been blocked by the courts now for 19 days. lester? >> pete williams tonight, thanks. in the suburbs of st. louis today, vice president pence visited an historic jewish cemetery desecrated by vandals. it comes after a wave of bomb threats made to jewish community centers across the couny.

took to the megaphone to declare there is no place in america for hatred, acts of prejudice, violence or anti-semitism. many of the gravestones have already been repaired and a muslim group has crowd funded nearly $100,000 for the cemetery and jewish centers nationwide. with the battle still waging over the president's immigration plans, house speaker paul ryan took fellow republicans on horseback on a fact-finding tour with homeland security officials today. along the southern border in texas. tonight secretary of state rex tillerson arrived in mexico. he will meet with mexico's president who, last month, canceled the meeting with president trump after he insisted mexico would pay for a border wall. president trump has said that proposed border wall will help stop the skyrocketing overdose raid of the u.s., driven in large part by an increase in narcotics coming in from mexico. as nbc's jacob soberov found out along a section of border that already has high security, smugglers are putting u.s.

>> reporter: this is the san ysidro point of entry. it is the busiest land border crossing in the entire world. every single day 50,000 vehicles, around 20,000 pedestrians and untold loads of narcotics make their way to the other side. while president trump said he wants to build a border wall to keep drugs out where there isn't one, this is actually the front line. that's one of your agents. >> correct. >> that stands out here to look for suspicious activity? >> correct. once he sees something, will he initiate contact with the driver. >> reporter: the dea says most narcotics entering the u.s. are driven in, hidden in vehicles, through what mexico's drug cartels call plazas, like mexicala, juarez and san ysidro. one thing these places all have in common, they're all areas with a border wall. what we're looking at right now is this vehicle is pulled into the secondary screening here at the port of entry and it got a positive hit from the canine, the

it appears in the dash is some sort of narcotics that have been hidden in the vehicle. they started to pull out these bags of -- i guess we don't know what they are yet. one, two, three, four, five of them so far. six, seven. eight. just keeps coming. do you know what you've got there? >> yes. >> reporter: what have you got? >> methamphetamine. >> reporter: is that a normal load? >> i would say we could get up to another five, six loads today and that wouldn't be abnormal for us. >> reporter: why, if you're a cartel, would you want to send drugs like this through a legal port of entry where you cross with a passport? >> they see opportunities to mix in with the general population. >> reporter: so translation, they think they can sneak y ityou? >> right. >> reporter: reality check for the president on one of his signature proposals. jacob soberov, san ysidro, california. y,a toas nmade a stunning announcement that captivated so many people around the globe. the space agency says seven planets

the first time around a single star. they're similar to earth and that means they could all contain life beyond our planet. here's nbc's miguel almaguer. >> reporter: the discovery is out of this world. seven earth-sized planets that could all harbor life and may help answer the age-old question, are we alone? >> my opinion, this is the most exciting discovery we've had yet. >> reporter: the first time outside our solar system that we found so many planets similar in size to earth around the same star known as trapis one. using telescopes in space and around the world, scientists discovered the planets all capable of hoeding wat water, a key ingredient to life. >> these questions about are we alone are being answered as we speak in this decade and the next decades. >> reporter: less than a tenth the size of the sun, trapis one is close and warm enough to heat the seven planets.

have conditions similar to our world. this is what they could look like. >> some of them could potentially be rocky and some of them could have water envelopes. at this point we simply don't know. >> sounds a little bit like earth. >> it could be. >> reporter: 235 trillion miles or 40 light years away from earth, it's too far to reach, using the space travel of today. >> what if we found evidence of life? i'm not saying anything is alive but this is how you start looking. >> reporter: we may not reach trapis one any time soon, but we are getting closer, and learning about a new planetary system that tonight will leave many wonder whag will we find next? miguel almaguer, nbc news, los angeles. >> does stoke the imagination. back on this planet in the west, a flood emergency has placed some 50,000 people under

rescued several hundred from the high waters in san jose, california. the mayor there admitted the city failed to keep residents properly informed of the mounting emergency. some say they didn't receive notice until they got a knock on the door from firefighters. police in indiana are pleading for help to solve a double murder mystery. investigators found the bodies of two teenage girls last week near a scenic hiking trail. today they revealed new clues, one of the girls being called a hero for recording the voice of the suspect. let's get to gabe gutierrez. >> reporter: this abandoned railway bridge is where 14-year-old liberty german and 13-year-old abigail williams disappeared. tonight, investigators are hoping three words will help lead them to the girls' killer. >> down the hill. >> reporter: a man's voice saying "down the hill." police played that clip publicly for the first time, reviewing it came from liberty's cell phone. the device also captured the image of a man walking near the hiking trail and other evidence that hasn't been released. >> this young lady is a hero.

to have enough presence of mind to activate the video system on her cell phone. >> reporter: police say they aren't certain whether this is the same man in the audio recording, but they're now calling him a suspect. the teenagers went missing last week after going hiking with their parents' permission. one of the last photos of abigail was posted by libby on snapchat. >> very good kids. sports oriented. that's a relationship together they -- >> reporter: their bodies were discovered the next day. this community, shaken. ron logan owns the property where the girls were found. >> it's just so mind boggling. i haven't really caught up -- it hasn't caught up with me yet. >> reporter: authorities are now offering a $41,000 reward for any information. >> as poor as this picture is, somebody knows. and if you're watching, we'll find you. >> reporter: they're hoping one of the young girls' final acts -- >> down the hill. >> reporter: -- can

[000:14:58;00] gabe gutierrez, nbc news. still ahead here for us tonight, silent side effects. new warning about some of the most popular heartburn medications. how taking them too often could be damaging your body without you knowing, until it's too late. also caught on camera, new video of actor harrison ford's dangerously close call at the airport. hi, i'm frank. i take movantik for oic, opioid-induced constipation. had a bad back injury, my doctor prescribed opioids which helped with the chronic pain, but backed me up big-time. tried prunes, laxatives, still constipated... had to talk to my doctor. she said, "how long you been holding this in?" (laughs) that was my movantik moment. my doctor told me that movantik is specifically designed for oic and can help you go more often. don't take movantik if you have a bowel blockage or a history of them. movantik may cause serious side effects, including symptoms of opioid withdrawal, severe stomach pain and/or diarrhea,

and tears in the stomach or intestine. and about medicines you take. movantik may interact with them causing side effects. why hold it in? have your movantik moment. talk to your doctor about opioid-induced constipation. if you can't afford your medication, astrazeneca may be able to help. what bad back?gels work so fast you'll ask what pulled hammy? advil liqui - gels make pain a distant memory nothing works faster stronger or longer what pain? advil. i can't wait for her to have that college experience that i had. the classes, the friends,

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americans suffering from acid reflux, have prescriptions for proton pump inhibitors or ppis, and many more take them over the counter, like prilosec, prevacid and nexium without a doctor's prescription. there could be dangerous side effects you may not even recognize if you don't follow the directions. here is nbc's kristen dahlgren. >> reporter: when kim henkel's doctor told her to take a pill for acid reflux. >> he said take it once a day. i'll see you in six months to a year. >> reporter: she had no idea her kidneys would be silently shutting down. proton pump inhibitors or ppis sold over the counter under brand names like prilosec, prevacid and nexium could develop kidney problems. more than half show no obvious warning signs. >> if the kidneys get bad enough it can shorten your life, increase your risk for heart attacks and strokes. we definitely don't want kidney dysfunction to go

unnoticed. >> reporter: she a routine physical, including bloodwork, picked up a change in her kidney function. >> i had no symptoms. that's the scariest part of this. this could have gone into something even more serious. >> reporter: the makers of the drugs point out the study looked only at prescription-strength doses and said they are safe and effective when used correctly. prescription ppis are only recommended for up to eight weeks. for over the counter versions, the fda says 14 days, no more than three times a year. >> if you do need to stay on them, maybe we should consider checking kidney function periodically. >> reporter: kim takes a different type of acid reducer and is considering diet changes to control her reflux. for her, a second chance, after a silent danger that could have been much worse. kristen dahlgren, nbc news, new york. up next here tonight, the new major league baseball rule

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it's your retirement. know where you stand. a new bombshell in the sex abuse investigation against the former head doctor for usa gymnastics. 22 new counts of first-degree criminal sexual conduct were filed in michigan against dr. larry nasser on behalf of nine alleged victims. nasser, who has treated many olympic athletes over the last 20 years was ordered to stand trial last week on previously filed charges. authorities now say 80 women, including at least one olympic athlete, have come forward to accuse him and more charges are expected. nasser has previously denied any wrongdoing. tonight, we're getting a look at that close call for actor harrison ford in southern california. new video shows ford's plane coming in for a landing flying right over top of an american airlines jet, mistakenly landing on

a taxiway instead of an assigned runway. he could receive anything from a warning to possibly having his pilot's license suspended. major league baseball may have found a way to make the game faster. the league and the players union reportedly agreed to a new rule on intentional walks. instead of making the pitcher go through the motion, the new rule would allow an intentional walk with a simple dugout signal. up next, diana's dresses. anything else to talk about. but then i realized there was. so, i finally broke the silence with my doctor about what i was experiencing. he said humira is for people like me who have tried other medications but still experience the symptoms of moderate to severe crohn's disease. in clinical studies, the majority of patients on humira saw significant symptom relief. and many achieved remission. humira can lower your ability to fight infections, including tuberculosis. serious, sometimes fatal infections and cancers, including lymphoma, have happened; as have blood, liver, and nervous system problems,

serious allergic reactions, tested for tb. tell your doctor if you've been to areas where certain fungal infections are common, and if you've had tb, hepatitis b, are prone to infections, or have flu-like symptoms or sores. don't start humira if you have an infection. if you're still just managing your symptoms, talk with your gastroenterologist about humira. with humira, remission is possible. do you know how your you might be surprised. stimulant laxatives make your body go by forcefully stimulating the nerves in your colon. miralax is different. it works with the water in your body to hydrate and soften, unblocking your system naturally. miralax. c'mohappy birthday! miralax. i survived a heart attack.

i'm doing all i can to for people who've been hospitalized for a heart attack. i take brilinta with a baby aspirin. no more than one hundred milligrams as it affects how well it works. brilinta helps keep my platelets from sticking together and forming a clot. brilinta reduced the chance of another heart attack. or dying from one. it worked better than plavix. don't stop taking brilinta without talking to your doctor since stopping it too soon increases your risk of clots in your stent, heart attack, stroke, and even death. brilinta may cause bruising or bleeding more easily, or serious, sometimes fatal bleeding. don't take brilinta if you have bleeding, like stomach ulcers, a history of bleeding in the brain, or severe liver problems. tell your doctor about bleeding, new or unexpected shortness of breath, any planned surgery, and all medicines you take. talk to your doctor about brilinta. i'm doing all i can. that includes brilinta. if you can't afford your medication,

astra zeneca may be able to help. finally tonight, she was a royal, a humanitarian and also a symbol of style. this year marks the 20th anniversary of the death of princess diana. and kensington palace is telling the story of her life through her fashion. nbc's kelly cobiella has an inside look. >> reporter: she was the most glamorous, the most photographed, the fashion icon. but before all of that, she was lady di in ruffles. >> she was a teenager when she wore this. >> reporter: now an exhibit, displayed in her old home, kensington palace. 25 dresses over two decades, like this. elegant, in all black.

a slit that almost goes to the hip. >> yes. princess. but, i mean, just carried off with such style. >> reporter: she wore midnight velvet for that white house visit and danced with john travolta. she called this one the elvis dress, one of 79 auctioned for aids and cancer charities. >> i think it's wonderful what they've done up there, and i'm so proud. >> reporter: since her early days as a princess, diana was shaping her own image through her clothes, looking at sketches with designers and making notes on the ones she liked. a handwritten "please." for a special occasion, prince william's christening and this one for hospital visits but she didn't want the hat. >> she said you can't cuddle a child in a hat. >> reporter: when william and harry were little, a dress few have seen before, worn in private, with tiny marks on the knee. >> fashion historian have speculated could be caused by hot little hands clutching on to the skirt. >> reporter: a story in every dress, of a mother, a humanitarian and 20 years after her

death, still the people's princess. that's going to do it for us on a wednesday night. i'm lester holt. for all of us at nbc news, thank you for

watching. and good night. . >> there you go. breathe with me. >> sorry. i'm sorry, man. >> come on, now, breathe with me. >> i just know i'm going to be close to him. >> oh, we have cried all season