breakingews tonight, the dramatic takedown after a deadly shooting spree st ju short time ago. police capturing the suspect wanted in the killings of four people at three different crime scenes. >> i just saw ten police officers with guns, rifles and handguns going crazy. >> the suspect's father and brother among the dead. the shots shocker at one of america's largest military bases. marines arrested on charges from human smuggling to drug offenses. the dramatic arrests happening durin battalion formation. >> jeffrey epstein placed on suicide watch. was he attempting to take his own life or could he have been attacked by another inmate? more bad news

tonight about the boeing 737 max plane, how it could throw a wrench into your travel plans and drive up ticket costs especially for the holidays. another major city laying down the law on escooters as deaths aninjuries rise. are they too dangerous for the ro and our journey to e he top of the road wherscorching heat is melting nature's wonders. >> announcer: this is "nbc nightly news" with lester holt. >> good evening we begin with breaking news, a killing spree that held los angeles in suspense for much of a day just ended with theture of a suspect. since this morning at oteast six people have been four of them killed. the shootings happening at three locations in l.a. san fernando valley including a city bus where the latest viim was shot. h olly hunter is in l.a. we latest. sp> reporter: tonight the suect is in custody after a deadly shooti

shooting spree across los angeles. >> he's armed with a 9 mm auto. >> they're searching. >> reporter: dramatic video shows s.w.a.t in teams zeroing . overnight, police say zaragoza went to an apartment in the valley shooting and killing his brother and father and wounding his mother. >> i saw police just in rathe building next to me and saw ten police officers with guns, rifles and hand guns going crazy. >> reporter: hours later at a gas station in north hollywood he shot two people killing his girlfriend leavin the other person in critical condition. on the run from there, rob ttempted to someone at an atm. then he boarded a bus nearby shooting a rson at close range. police have confirmed the person shot on the bus has died after that shooting. police tracked down the shooting walking itn a nearby street. authors took him down by tasering him. police now seeking to question zaragoza in connection with at

least four murders across the san fernando valley. >> thanks. and also breaking in southern california today, the dramatic mass arrest of 16 u.s. marines at camp pendleton. the junior enlisted troops busted as they stood in formation facing charges related to drugs and human trafficking. our miguel almaguer has late details. >> reporter: the 16 marines at camp pendleton were ten into custody today during battalion formation. the dramatic takedown by ncis part of a morning sweep. the marines arrested for their alleg involvement in various illegal activities ranging from human ugh sm lg to drug related offenses. the u.s. marine corps saying in a statement an additional eight marines were taken aside to be questioned on their involvement in alleged drug offenseselated to today's arrest. >> i don't remember this number of people being arrested all at once. and so it's extremely unusual for a sweep to be made with this number of arrests.

>> reporter: withholding specifics as thearine corps investigates, ficials confirm the arrests came after formation was gained from a previous human smuggling investigation. on july 5th, two marines were charged with transportation of certain aliens for financial gain after investigators say they agreed to transport three mexican citizens for $8,000. with the possibility na additio charges, the marines say none took part in the southwest border support mission, and those arrested are juni enlisted. tonight 16 accused of breaking the law and betraying their motto of always faithful. the marines who were arrested today and those who were also pull aside for questioning at camp pendleton remain in the custody of ncis investigators. this matter will be addressed in the military court system, not the civilian one. lester. yo> all right, miguel. thank next tonight,

jeffrey epstein the multimillionaire and accused sex trafficker su was placed oide watch after he was found injured in a new york jail. s tephanie gosk and the questier what happened inside his cell. >> reporter: jeffrey epstein was found on the floor of his cell se conscious in a fetal sition with marks around his neck. there are conflicting planations from multiple law enforcement sources. one theory is that epstein tried to take his own life. another is that the 66-year-old faked a suicide to try to get transferred from this notorious jail in manhattan. but the possibility that epstein was atta considered.eing two people familiar with the incident tell nbc's new york station that epstein shared a sell with nick, a former police officer accused of murder. nick's lawyers say his sclient was questioned but i not a suspect. >> he did nothing

wrong at all. and he's not being investigated for doing anything wrong. he's not been accused of dng anything wrong. >> reporter: a judge denied epstein's bail after he pleaded not guilty to sex trafficking charges leaving him locked up until trial, a sharp contrast to his luxury homes in new mexico, new york, and the caribbean. local zoning permits show epstein was expanding his compound from this island to a second one bought in 2016. these isnds are public property, but jeffrey epstein made it clear the rest of this island is not. he been doing construction here up until his arrest.'r told that this white shed was built s only a few monthago. epstein may never be back. the rest of his life could be spent behind bars. nbstephanie gosk, news. there's more bad news related to boeing's troubled 737 max planes. southwest airlines today extended t length of time it's cancelling max flights until next year. that could mean fewer

planes and higher holidays.s over the here's nbc's tom costello. >> reporter: no airline in the world owns more boeing 737 max's, all of them grounded, forced to cancel 20,000 flights this year. southwest today said it's cutting servi to me wark airport and fdoesn't expect toly the max until january 5th at the earliest. >> we're unhappy that it's takinso long. we're in the dark on a number of technical matters. >> reporter: grounded since march 13th following two fatal crashes over seas, no plane has ever been grounded so long. 5 outhwest hoped to have 7xes in its fleet by year's end. american 40, united 30. but if they can't fly it during the winter holidays, that could impact holiday travel. >> we're likely to see fewer seats available and higher pces on routes that are less popular but frequently y ravelled during the holiason. >> with new planes stacking up in seattle, boeing is warning it could cut

production if faa recertification is delayed until the fall or winter. >> this is a bad situation that keeps getting worse for boeing and for the airlines that fly the max. >> reporter: boeing tells nbnews the safe return to service of the 737 max is our company's t priority. >> the advice from the travel pros start air faresor for the winter holidays and if you see a good price, grab it. one day after robert mueller testified before congress, mocrats tonight are still debating whether to pursue impeachment of the president. white house welker is here.ten kristen, this is a big split among democrats and it didn't change because of yesterday. >> it certain is lester. good evening. democrats are still very divided about how to move forwd. capitol hill sources tell nbc news there's broad agreement the mueller hearings did not deliver the kind of punch they were hoping for to start impeachment proceedings and it tu

acly may have blunted momentum. but there are still democrats who are notre ady to give up on impeachment. ultimately it's up to nancy pelosi who had a meeting with democrats last night, made it very clearhe's not on board with the idea. president trump believes the hearings were a win for him as democrats, lester, are preparing to file a lawsuit to t to force the president's former white house counsel don mcgahn to testify. he was a key mueller witness. there angry ations at a house hearing today on immigrationd the trump administration's border policies. jeff bennett has that story. >> reporter: tonight divisions over the migrant crisis. house democrats condemning how the trump adnistration tiplit migrant families somes sending parents back to their home countries without their children. >> you were doing deportation before the reunification without any knowledge of whether the parents are being reuninified? >> yes. in other words you're kidnapping the child. >> not kidnapping the

child. >> taking a parent without their child is kidnapping. >> reporter: the tmp ministration is under fire for the family separation policy and continues facing criticism over reports of deplorable conditions at detention facilities along the border. and tonight nbc news has exclusively ne le that active duty u.s. troops are stationed inside a border patrol holding facility in texas monitoring detainees despite past assurances that active duty troops would not be in direct contact with migrants. the u.s. military says the troops are not armed or aing as law enforcement. 17-year-old abner, a guatemalanrant talks about conditions he encountered at a border. he described having nowhere to sle for days giving his food to younger children so they wouldn't go hungry and seeing a guard punch a boy in the stomach. a customs and border protection official tells nbc his claims are cynconsistent with agen records of his time in custody.

more challenges for a border in crisis. jeff bennett, nbc news washington. tonight puerto rico is preparing for a transfer of power after the governor resigns following nearly two weeks of demonstrations. protesters say more needs to be done about what they see as rampant corruption. nbc's gabe gutierrez is in san juan. >> reporter: tonight protests have turned parties on the streets of san juan. >> we say bye-bye to ricky. bye-bye. this is it! ov >> reporter: gernor ricardo caved overnight to intensifying pressure amid the threat of impeachment. hearing the news, the island exploded. >> this is like my -- i can't even describe it. we have been waiting for this for so long. >> reporter: now puerto rico's cr seetary of justice

wanda vauez is said to take over net week. but to many of these otesters, she's already controversial, seen as one of his political allies. vasquez inherits a government dealing with a year's long recession, allegation of ramparuption, and rebuilding after hurricane maria. joyce's grandmother on an oxygen tank died in the storm's after math. t >>s is not a joke. neez are these are lives. these are your people and you make light of it. >> reporter: now the cus shifts to the prosecution of several local officials who were arrested and charged with er corruption h earlier this month. lester. all right gabe, thanks. next a deadly heat wave sweeping across europe, shattering records in several countries including france france which poses a fire threat to notre dame cathedral. >> reporter: it's the hottest since the eiffel tower was built or since anything in paris was built, over

108 degrees roasting american tourists. >> it is ridiculously hot. >> we got to play in thfountain. this was amazing. >> so hot architects fear the roof of notre dame cathedral could collapse. in belgium it's the hottest since 1883. in the netherlands and germany more recordsmashed. in britain, 100 degrees in july for the first time. and europe may just have to get used to itce ly it's had the five hottest days in the last 500 years. in portugal wild fires are raging. in france, fears of a repeat of the 15,000 heat wave deaths a decadeago, air conditioning not big in europe. it's famous chocolate no match for the heat. no match for the heat. relief and rain is in sight, the warning now for wild storms and flash floods. >> thank you. in this country alaska has warmed twice as fast as the rest of the world in the last 50 years. and now parts of alaska are feeling the heat.

this summer as new records are being set rtin the southern pa of the state. kevin tibbles went to alaska to see the effects firsthand. >> reporter: alaska's blue white giants are ing falling to rising temperatures in the 49th state. >> 34 degree water recently melted ane snow. >> reporter: matt guides tours on the massive spencer glacier. >> on 2009 yoused to be able to step on the ice from the end of the trail. >> reporter: today we have to kayak to the glacier's face a mile away, nimbly making bergs ay past i that have broken off. >> perhaps as recently as 30 yea ago, where we're kayaking now would have been under hundreds of feet of ice. >> reporter: climb tolgs have come to see the damage firsthand an ice mass that's thousands of years old. month on record, any t month, any year for this region. >> reporter: on july coth, anchorage set a

new re at 90 degrees. forest fires leave a haze that hangs in the air. fisheries, a $6 billion industry are jeopardized. and the ice keeps melting. a helicopter is now the only way to reach the top. they say the spencer recedes 100 feet a year. >> this is a phenomenal place of natural beauty. the tragedy is is disappearing before our very eyes. >> reporr: matt's tour business ascending path is also receding. >> i love the aesthetic of what melted water creates, but the cause of it is heartbreaking. >> reporter: with more carbon in the mo atsphere, it's getting hotter and meltg glaciers causing water levels worldwide to rise. >> in many other places you can't see ose changes but they're occurring. climate change is affecting everybody. er>> the glas a bit like a canary in a coal mine.

>> reporter: monuments from the ice age now in retreat. kevin tibbles, nbc news, alaska. still ahead the explosion scooters and injuries and the drastic asures some cities are taking. also the wild ride at the airport, scary moments as a ar-old wanders away from his mother. i don't want any trade minimums. yeah, i totaavy agree, they don't hany of those. i want to know what i'm paying upfront. yes, absolutely. do you just say yes to everything? hmwell i say no to kale. mm. yeah, they say if you blanch it it'satetter, but th seems like a lot of work. no hidden fees. no platform fees. no trade minimums. and yes, it's all at one low price. td ameritrade. ♪ we carry flowers that signify why we want to end the disease., and we walk so that one day,th e will be a white flower for alzheimer's first survivor. join t fight at alz.org/walk. so chantix can help you quit slow turkey.key.

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next tonight the latest american ci to slap new restrictions on those popular escooters as the number of deaths and injuries on them rises acrohe country. are they too danrous for the streets? here's nbc's vicky wynn. >> reporter: on the streets, in bike lane even on highways. last year motorized scooters accounted for 39 million rides in cities across the country. there are major concerns. in atlanta, two riders died last year, one just last , a 37-year-old man run over by a bus. the driver not at fault, but the incident sparking protests and prompting city leaders to pause issuing permits to ngcompanies supplyi the scooters. according to a recent study, head and facial

injuries caused by electric scooter accidents tripled over a decade. >> we're seeing significant injuries to the head and face, broken faces, broken noses, cuts. we're seeing people who have injies to their neck. >> reporter: many cities are struggling with balancing safety and convenience. >> great way to get around. we love them. go to lunch, come back, no parking. good for the environment. >> they go like 15-miles-per-hou you can get it to 25. just got to be careful on them though, they go pretty fast. >> reporter: nashville tightened its scooter rules after a rider died in may. >> i don't want any mi faes to experience the pain that me and are amil experiencing right now. >> reporter: companies, cities, and riders looking for solutions to make sure the new way of getting around is as it can be. vicky wynn, nbc news new york. the scary moment as a toddloes his own way at a busy airport.y about my family history. went to ancestry, i put in the names of my grandparents first. i got a leaf right away.

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have happened, as have blood, liver, and nervous system problems, serious ndlergic reactions, aew or worsening hefailure. 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 sore don't start humira if you have an infection. man 3: ask youhurheumatologist about mira. woman 4: go to mypsaproof.com to see proof in action. we're back now with that wild ride

for a 2-year-old boy that took him deep inside atlanta's on rtsfield jac airport. gadi schwartz has more. >> reporter: six different surveillance cameras capturing justw hoickly a toddler can get into trouble at the busiest airport in the world. the 2-year-old darting away from his mother who is printing a ckoarding pass at c in and inspecting a conver belt behind check in and hoisting himself up. his mom rushing over in a panic. the agent stopping the belt but not soon enough. the boy was swept into a baggage room where he tried crawling overgg lue to avoid this screening machine where a purple suitcase pushing him inside. he pops out, crying, before sliding into a room full of tsa ivgents who scooped him up fminutes after the ordeal began. >> at that moment he became all of our child. you know, and yowa ed to take care of him. >> reporter: the boy's hand was injured, but he's expected to be erkay. his told authorities she only looked away for se cond. airport officials

now reviewing the tapes to make sure this never happens again. gadi schwartz, nbc news. what a wild ride. glad he'okay. when we come back, inspiring america with a life-changing gift for one little girl.

we end the broadcast tonight with the story of a little girl on new york's long island who got a big surprise that'ch ged her life. joe fryer has our inspiring america report. >> reporter: in life, all of us could use a helping hand.

for 5-year-old alice carrillo, that hand is pink. >> how much do you like having that hand? >> a lot. you see alice's right hand is smaller than her left. so, engineering students at the university cincinnati designed a mechanical one. alice's mom recorded the moment she first atested it, openi drawer. >> this is amazing th it can do this. >> reporter: before walking over to her soon-to-be step dad. >> can i grab your , and? >> yesu can. >> reporter: a moment that touched hearts. >> it was incredibly sweet. of course we were crying the entire time. >> reporter: that sentiment was shared who made the hand. they're part of a nonprofit called enable uc. >> it reminded me what it's all about, why i'm doing this and why i'm putting so many hours into understanding this process. >> you've got to pump your legs, babe. >> reporter: alice uses it to swing and play with barbie when she took it to show and tell, she did something most of us take for granted.

>> you like giving high fives? can i get a high five? >> reporter: something so simple made possible by something so complex. alice's helping hand. >> i love you. >> reporter: joe fryer, nbc news, new york. >> good for alice and those talented students who built her new hand that's "nbc nightly new hand that's "nbc nightly news" for the not all water is created equal. only 1 billionth of 1% is filred naturally.

and emerges crisp and refreshing enough to be called deer park 100% natural spring wer. born better® (whishe's been hosting all got her nesorts l things.ture, ies, tonight is all about letting loose. so fill up those glasses and let's paint! (sighs) where do you want me? (screams) tom? let's talk! havertys summer savings event is going on now. and we put everything on se! get big savings on sofas, dining sets and more. these deals will make you... ...the hostess with the mostess! havertys lifeooks good. . i am not embarrassed or ashamed of anything. i am here to debu believes. >> only on"a