multiple fronts, a terror popped. a u.s. army veteran and an alleged isis sympathizer wanted to commit mass murder and one of the potential targetwas setting off a bomb at the crowded santa monica pier. how he was caught in an fbi sting. new extraordinarily acts of heroism at the synagogue. an iraq veteran running towards the gunman and tonight he'll take you to one of t largest sin grogs in the world on alert and epping up security. >> boeing ceo under tire facing a barrage of questions for the first time since those air disasters in a fleet of grounded planes.

the latest on the in investigation to the deadly crane collapse on the google campus. cars crushed, four killed. what went wrong. hollywood remembering a trailblazer. john singleton, the first african american to earn an oscar ie nomination dat 51 after suffering a stroke. an nbc news investigation of the popular company that screens and recommenus d workers for your home improvement projects but some homeowners say their remodels were a nightmare. >> found out he was a igonvicted felon. >> tonht how home advisor is responding and what every homeowner should know. >> announcer: this is "nbc nightly news" with lester holt. good evening. the cycle of hate and bloodshed from sri lanka to new zealand

and sighthe fbi says it arrested a u.s. army street veteran ranging from freeways and tourist attractions in los angeles to police officers themselves, while expressing praise for isis. our pete williams has late details. >> reporter: federal prosecutors say 26-year-old mark steven damingo praised isis and told fbi undercover operatives he wanted to shoot police officers in patrol cars or set off a bomb on an l.a. freeway or at sae a monica pier or a white nationalist rally. he came to the attention in early march when he wrote on alhe internet he wanted to retiate for last month's shooting spree at mosques in new zealand. >> this is when law enforcement identified man consumed with hate and bent on mass murder and stop him before he could carry out his attack. >> reporter: investigats say damingo settled on attacking long beach but had no idea how to build a bomb. prosecutors say he was

arrested friday night after receiving what he thought were real bombs from the undercover operatives but the fbi says there was never a danger to the public because he was under constant surveillance. no comment yet from his lawyer, lester? >> pete williams in washington, thank you. the isis mpathizer is arrested, the leader of isis emerged after five years without being seen. our chief foreign correspondent richard engel has late details and new video of the reat. >> reporter: the video appears to show the elusive isis leader giving a pep talk to supporteit. only the second video of him, the first fiveears ago when he foded the islamic state. tonight, baghdadi acknowledges his state is in ruins ground under foot by a u.s. led collision so he has a new tone, the terror group will live on he saysfighting a long war of attrition captured isis members in syria

told us last month baghdadi lived like a ghost. did you ever see him with your own eyes? >> absolutely not. only on tv. >> reporter: baghdadi .wants to be seen apparently copying osama bin laden who sa released mesges for years. u.s. officials a still working to confirm the vio's thenticity but not expressing doubts. lester? >> richard engel, thank you. this evening a celebration of life is unay for the woman killed inside a synagogue north of san diego when a was killed. details about the 19-year-old suspect and we're hearing about traordinary acts of heroism as the attack unfolded. nbc's miguel almaguer is there. >> reporter:onight in the very synagogue where the gunman opened fire, a celebration of life for laurie gilbert kay, the 60-year-old shot to death during a prayer service on the final day of passover. >> her husband ran to assess the situation. didn't even know it was his wife laying on the floor. he started to do cpr and realized it's his wife.

he fainted and passed out. he's laying next to laurie. >> reporter: the rabbi goldstein was shot in the hand saturday, bullet holes still riddle the door the gunman blasted through. he took a bullet to the leg ushering children o of the line of fire. he helped many escape the bloodshed including his 8-year-old niece struck by shrapnel. >> we went upstairs like crying and i was gushing blood. >> reporter: police say the gunman walked right through that door and into this room and suddenly began to open fire. survivors say he never said a word and simply stopped shooting because his weapon appeared to jam. e before policrived, oscar stewart, an iraq ran ran towards the shooter risking a his life to save others. >> i don't think there is any oer reason other than god gave me the courage to do it. >> reporter: nearby, 19-year-old john earnest was arrested after he cled 911 himself. tonight, the fbi

confirms it received a tip about a social media post minutes before the attack on ouhe forum 8 chan, an anonymwebsite used by them and tonight the suspect isn after thought, a face and name to be forgotten as a the life of someone larger than life and the heroes that saved so many others. with hundreds including a masse erflow crowd remembering the victim and the survivors, tonight we have learned the suspect will be in court tomorrow. he'll be charged with one count of murder and three counts of attempted murder plus a special enhancement for hate crimes. >> somber scene, thank you. the california shooting one of several attacks of people of faith here

in the u.s. and around the world in recent months. tonight police here in new york and across the country are making their presence known outside houses of worship to detour attackers and reassure worshippers. sh for many worpers, it's becoming a familiar sight, armed officers and guards stationed outside as they pray inside. within hours of saturday's attack, the nypdamped up security at synagogues. >> not only do we want to make people feel safe b we want to in fact, make them safe. >> i see vans and offers out here, that's a deterrent. >> it is. it's a presence that we want to let people kn and let the good people know that we're out here and we're capable of protecting them. we want to let the bad people know it's a warning. >> james waters is the chief of counterterrorism for the nypd. he says their approach is proactive. houses of worship all , tehem atlook e . tith for.me >> it was just six months ago 11 ople were killed at tt urgh's tree of life synagogue. but all faiths have been targeted in the recent wave of

violence, christians in sri lanmuslims in new zealand. just two weeks ago a man was arrested attempting to enter st. patrick's cathedral with gas cans and lighters. the often common link between attackers, the online forums where violent threats appear. is it a difficult thing to weigh what is a threat and what is just talk? >> well, it's a fine line that people claim it's freedom of speech anut we sometimes look at it d if it's concerning and threatening, we take a very close look at that. >> joshua davidson ie nior rabbi. at newyork's temple emanuel. f >> when houses o worship have to guard their doors the way they are now, then that really undermines the very efft that we aspire to. >> yet, these stone barriersit outside the temple subtle and decorative but grim reminders of too many headlines. are people genuinely scared? are they talking to you guys? >> it's more of an awarens.

we tell them don't be scared, take that nervous feeling that you have and channel that into pome tive energy and know that the police can protect them. >> the nypd routinely circulates anti-terror teams not only outside pl es of worship but financial and tourist areas, as well. >> in seattle, investigators are trying to determine what caused a crane at a google building apnder construction to coll and kill four people. tonight, new images show the horror as it came crashing down. our joe yer is there. >> reporter: video from a car's dashcam t captures the mom crane collapses striking a building and breaking apart before landing on six cars on the street lo bew. >> in the rearview mirror, i saw the crane fall behind my truck. >> reporter: vince was also driving in the area. he says he jumped out to help rescuing one woman from a crushed car and comforting her

friend sarah wong, a college student who d eventually diefrom injuries. >> she wasn't alone. ai stayed as longs i could with her. >> reporter: in all, four people were killed including two iron workers othe crane. one of them marine veteran travis corbit married his wife samantha just last year. >> he was the best partner i could have he was unbelievable. it's really tragic the world lost such a special person this soon. >> reporter: state regulators say the crane part of a project to build a google campus was coeing disassembled when iapsed. it's unclear if wind played a role. the national weather d ervice says gusts reache high as 23 miles an hour around the time of the collapse. the general contractor on this project says it is cooperating with authorities. th investigation into what went wrong is expected to last at least six months. lester? >> joe fryer in seattle tonight, thanks. this evening it is six months to the day since a boeing 737 max

crashed in indonesia s and two monthsince another 737 max crashed in ethiopia and the ceo of boeing was answering questions for the first time since those disasters and direct questiing from tom costello. >> please join me in a moment of silence at this time to honor the 346 people on board those two flights. >> reporter: consumed by the greatest crisis toit boeing in decades, ceo dennis today faced tough questions from shareholders. >> you don't have to have 300 plus people die every time to find out something is unreliable. >> reporter: boeing says an anti stall system on the 737 max stall n ysten the 737 max-stall systeme 737 max called mcas misfired and pushed the ne of the plane into a fatal plunge in indonesia and ethiopia. before the indonesia crash, boeing never told the airlines or pilots about mcas because says boeing pilots didn't need extra training. ys> why did you put an

mcas sm in place without notifying them? >> it's embedded in the handling qualities of the airplane. when you train on the airport, you're being trained on mcas. it's not a separate system to be trainedon >> reporter: boeing is working on a software fix but says mcsa waa wass was one of several factors that caused both crashes and poted to e pilot's actions including the excessive speed. >> there is no singular item. it a chain oevents. >> reporter: meanwhile, the families of ten canadians today filed a wrongful death suit including paul who lost his mother, wife and three children in the ethiopian crash. >> the pain i've gone through, nobody will ever take that away, and nobody will ever bring my family back. >> tom joins us now, tom, we know the max is still grounded worldwide. is there word when the plane might beleared to fly again? >> reporter: the final flight plan or flight

test are expected this week or next, boeing did submit to the faa the software package, r the upgrade fo approval. that could take weeks so we probably are looking at mid to late summer before the max flies in u.s. skies again. >> tom costello, thank you. let's turn to the record-breaking measles outbreak we' been following. the cdc reports the me number of conf cases is 704 across 22 states. that's the highest in c 5 years. the cdso recommended today that anyone flying internationally be fully vaccinated at least two weeks before their trip. now to the road to going through the key battle ground of pennsylvania today. joe biden holding his first rally in pittsburgh arguing he's the democratic that can take the state president trum won by lesthan 1% in 2016. >> we democrats, we independents who have the same view have to choose hope over fear. unity over division.

maybe most lmportantly, truth overs. [ cheers ] >> nbc's kristen welker joins us from the white house. that audience biden was talking to could play a very big role in 2020. >> reporter: indeed, lester. former vice president biden was speaking to a firefighters union that just endorsed him. it's a part of biden's argument that if he's the nominee, he can win back working class voters in rust belt states prompting president trump to fire back. many union members are trump supporters and tweetingme to pennsylvania, sleepy joe enjoy the trumec onomy. biden is just four days into his primarro out and has faced criticism for not directly apologizing for his handling of anita hill's sexual atharassment allegns during thomas tilearance's confir, again trying to turn the page, biden saying quote i take responsibility that she did not getr eated well, lester? >> kristen welker, th>>ks. we have a lot more ahead including tragic news about a trail blazing hollywood director and our nbc

news investigation into home improvement nightmares, one couple says a pular website matched them up with a convicted felon who left their home a disaster. and the miracle cave rescue, how one man escaped and helped save his family and friends. stay with us. oh, could you, uh, make me a burger? -poof -- you're a burger. laughter ] -everyone acts like their parents. -you have a tattoo. -yes. -fun. do you not work? -so, what kind of mower you got, seth? -i don't know. some kid comes over. we pay him to do it. -but it's not all bad. someone even showed us how we can save money by bundling home and auto with progressive. progressive can't protect you from becoming your parents. t we can protect your home and auto. progressive can't protect you from becoming your parents. i was told to begin my aspirin regimen, blem. and i just didn't listen. until i almost lost my life. my doctors again ordered me to take aspirin, and i do. beorure to talk to your doct before you begin an aspirin regimen. listen to the doctor. take it seriously.

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next tonight, next tonight, our nbc news investigation into the popular home improvement site home advisor. we partnered with our affiliates that reported on dozens of home repair disasters across the country. owonight, the homeners have a warning you need to hear. here is nbc's morgan chesky. >> reporter: you may have seen the commercials. >> for over 15 years, homeowner haves trusted home advisor. >> reporter: home advisor promises to screen contractors that will go intmeyour or projects ranging from plumbing to remodelling. >> home advisor conducts criminal and ial background checks on their service professionals. >> reporter: nbc affiliates across the country have uncovered

dozens of home advisor contracting disasterin omaha and charlotte. julie and jeff in the middle of a remodel turned nightmare. so we checked back in with them. how long has it been looking like this? >> about a year and a half. >> reporter: the contractor home advisor recommended kenneth bell. >> he installed the retiles and they a hallow back there, moisture can get in there so all of this has to be ripped out. >> reporter:ell abandoned the job leaving their home a mess. again, home advisor says it performs criminal bround checks but they missed the vickers found with a simple google search. >> pretty easily found out he was a convicted felon. >> reporter: a felon>> onvicted federal felon who had been on probation again all most the entire time he was on our job. >> reporter: kenneth

bell who pleaded guilty to a drug charge declined to comment. home advisor told nbc news prior to the lltheir complaints, be was removed for an unrelated reason and customer satisfaction is a top concern and screen all alicants and constantly working to improve screening processes but no screening process is foolproof and we're deeply disheartened when the vickers experienced. they say tho words run hollow as they are left picking up the pieces. home advisor may be a starting point but warns. >> it doesn't matter where you find a buness, but you still have to do some due diligence. you have to do research. >> reporter: a simple tegy to avoid something like this. morgan chesky, nbc news, charlotte. coming up, tributes pouring in for an oscar nominee.

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body including a mount for a camera. inside the mount, the words equipment of st. petersburgnd speculation among fxperts, the whale was usedor some sort of surveillance. tonight hollywood is mourning the loss of john singleton. the first to own an ti oscar nomina for best director died days after suffering a massive stroke. director john singleto to fame at an early age months after graduating from usc, he began shooting his ground-breaking debut movie "boyz in da hood." l 1 the 1991 drathe 1991 drama

earning him a best director oar mination at 24 years old making him the first african american and youngest person ever nominated for that award. "poetic justice" followed. s >> i make fiat have a heart and ordinary people can identify with. >> reporter: he directed "e people versus o.j. simpson" lend "snowfall." singn spent his life advocating for black artist and films in hollywood. actress regina king tweeting rest in power my friend, one of the greatest to ever do it. john singleton was 51 years old. >> and tonight, he's being remembered as a trailblazer who opened the door for so many others. we'll take a break and o up next, the ho helped save five others trapped inside a cave. and now we're just back at square one again. it's very difficult for the family because you too through everything that they go through. maybe not the same way, but you're still there. (announcer) you can quit.

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about xeljanz xr finally tonight, our gabe gutierrez ab tells a rema survival story. >> repelling rope one.

>> reporter: one by one the five trapped men were pulled to safety. >> it's a miracle. ep >>ter: andrew webb was the sixth, he escaped first and called for help levering behind his th , brother and uncle, two friends. it's known as cyclops cave. an experienced cave explorer, 22-yr-old webb planned the trips for weeks. he told a relative if nobody heard from the group by sunday send for help but by saturday night they realized time was running out. there was heavy rain and mud. the others suffering from exhaustion and hypothermia. how did you manage to climb out? >> there was a few cracks you could grab hold enough and tinally i got hold enoughwedge myself between two walls and snake out. it was do or die. climb or go. >> reporter: hours after webb called 911, emergency crews repelled in. >> it was ke winning the lottery. >> reporter: the narrowest of victories

fueled not by luck but adrenaline. gabe gutierrez, nbc news, cleveland, virginia. >> glad they are out and okay. that is "nbc nightly news". i'm lester holt. thank you for watching everyone and good night. news". i'm lester holt. thank you for watching everyonend good night.

hey, oprah how was t party? >> she's not twauking down the aisle, but it wasefinitely oprah's bridal weekend.