The same kind linked to a string of deaths. The largest recall in history. Why are they still being put in brandnew cars . Nightly news begins right now. Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. Im Savannah Guthrie in for lester. There were moments of terror and fear today on a Major College campus in the nations second largest city. Ucla under lockdown for several tense hours this morning, with reports of a shooter on the loose on campus. Thousands of students running for safety. In the end, two people were killed. A professor and a student. In a murder suicide. Police are still trying to unravel. It had an entire city on edge and on high alert. Reporter police streaming from across los angeles. A huge response to reports of a shooting on ucla campus. From above, the sights of tactical teams spreading will out, looking for the shooter, and extracting students to safety. I was just on my way to class. Two Police Officers came running towards me. They screamed, get out of the hallway reporter while inside the lockeddown buildings, social media showing teams searching halls, classrooms, students taking cover. In the lockdown site that i was at, some of the students were calling their parents, telling them that they loved them. Reporter after nearly two hours of uncertainty the murder victim and the suspect appear to be at the scene. The pistol is at scene. We think its entirely contained within the office that it occurred in. Reporter lapd now says the shooting happened inside an engineering building. A professor killed before the gunman took his own life. A suicide note found on the scene. The motive still being investigated. The shooting scare coming right before finals, for the 43,000 students on campus. How do you concentrate on finals after Something Like this . Thats exactly what i was thinking. I was worried. My brain just cant go back to that now. Reporter how to reassure a student body at another university locked down by a shooting on campus. Tonight several Law Enforcement sources tell nbc news that the shooter appears to have been a student who had a grudge against a professor. Classes are scheduled to resume tomorrow morning. Savannah . Gadi schwartz on campus for us, thank you. Tonight were hearing audio of the moment a terrified mother called 911 to report her toddler had fallen into the gorilla enclosure at the cincinnati zoo. The child was rescued unharmed after zoo officials made the decision to shoot the gorilla. A controversial call still being debated nationwide. Nbcs joe fryer now with the tapes and the latest on the investigation. Reporter 911 calls capture a mothers frantic moments after her 3yearold son fell into the gorilla enclosure at the cincinnati zoo. At times the 420pound silverback gorilla could be seen pulling the boy across the moat. Eventually zoo officials decided to shoot and kill the gorilla. Today the boys family released a new statement saying the child had a checkup with his doctor and is still doing well. We continue to be thankful to the cincinnati zoo for their actions taken to protect our child. Zoo Officials Say it appears the boy went over a 3foot barrier and through several bushes before falling 15 feet into the moat. Cincinnati police say theyll review the actions of the boys family leading up to the incident. The family has reportedly received death threats, and online nearly half a Million People called for a petition for the boys mother to be charged. Police will not be investigating the zoo, but the association of zoos and aquariums which accredits of zoos will look into the incident. The group has specific protocols for enclosures. These enclosures not only have to protect the animals on the inside, but they have to protect the public on the outside. Reporter the boys family say some have been offering money. They dont want it. Instead, they have been encouraging donations to the zoo in their name. Stunning news about the biggest recall in american history. Upwards of 69 million cars with potentially explosive air bags. Linked to a string of deaths. Theres word that at least four automakers are still selling new cars with those same kind of potentially faulty air bags. Nbcs tom costello now with a consumer alert. Reporter its terrifying news for anyone considering a new car. Some of those cars come with potentially defective air bags that will likely be recalled in just two to three years. But sold legally now, because investigators believe they wont go bad for at least six years. I have this scar here on my arm. I have this one down here where they removed a chunk of metal. Reporter already exploding takata air bags have injured more than 100 people and killed ten. Most recently, 17yearold huma in texas. Its absolutely ridiculous that the American Consumer buys a new car only to find out in two years that its going to be recalled. Reporter among the new models currently being sold with suspect air bags, the 2016 and 17 mitsubishi, and volkswagen cc, and 2016 audi tt, and r8. Toyota and fiat, chrysler are also selling vehicles with the potentially defective air bags, although they insist theyre not under recall. Fiat chrysler tells nbc new they meet or exceed all applicable safety requirements. But car dealer steve says vw isnt telling its customers about the air bags. He is, and wont sell the affected model. If we know itsa poisonous issue like the air bags, were not going to sell it. Were not going to put our customers at risk. Reporter the problem . There simply arent enough replacement air bags for the 69 million cars already under recall. Are you comfortable with how quickly these takata air bags are being replaced . Absolutely not. Thats the worst lesson from the last young woman who lost her life. Reporter the warning, buyer beware, the car may be new, but it may be coming with a defect and looming recall. Tom costello, nbc news, virginia politics now. There are new questions being raised about Donald Trumps business history, which he has repeatedly offered as a key credential in his run for president. Newly unsealed testimony, former employees of Trump University accuse trump of running a fraudulent scheme. Nbcs katy tur has been digging into the testimony. Katy, good evening. What have you found . Reporter good evening, savannah. 3,500 legal actions in the past three decades, donald trump is officially the most la tig latigou srks president ial nominee in u. S. History. The Class Action Lawsuit against him has many wondering if he may have made millions off the backs of struggling americans. Donald trump selling the American Dream on the campaign trail. I will give you everything. Reporter but is now defunct forprofit university is accused of crushing that dream, scamming hopeful students with aggressive sales tactics and false promises. Success, its going to happen to you. Reporter trumps secret to selling unsealed by a federal judge. Hundreds of documents, including testimony from one former sales manager. Saying, Trump University was a fraudulent scheme. That preyed upon the elderly and uneducated to separate them from their money. Another Sales Executive saying it was just selling false hopes and lies. The candidate facing trial in november is now calling out the ethnicity of the cases indianaborn judge. The judge, who happens to be, we believe, mexican, which is great. What hes doing is a total disgrace. Reporter trumps lawyer denies fraud and points nbc news to this campaign video. I must tell you that the courses that i took were outstanding. Reporter the University Seminars at first free were aggressively sold from 1,500 to 35,000. Students allegedly encouraged to max out their credit cards. I was highly deceived. Reporter plaintiff George Hannah said he drained his retirement to pay for Trump University. I get this sick feeling in my stomach to not only see that, you know, from my own personal experience, but i see him playing those same exact cards with this whole country. If it looks like these businesses were not well run, it could cut a real hole into his case that he is the best person to run this country and make it great again. Reporter katy tur, nbc news, sacramento. Im Kristen Welker in new jersey where Hillary Clinton wasted no time on going after donald trump on Trump University. This is just more evidence that donald trump himself is a fraud. Reporter the clinton team hoping they finally found a message that sticks, painting the billionaire businessman as a con artist. He is trying to scam america the way he scammed all those people at trump u. Reporter but its not the first time trumps rivals have tried this strategy. This man is a pathological liar. A con artist. Reporter will it work for Hillary Clinton . The Clinton Campaign is counting on research, surrogate, and Hillary Clinton herself driving a message that none of Donald Trumps previous opponents were able to do. Reporter and late today, the current commander in chief broadening the attack, arguing trumps tax plan will hurt the middle class. That is not going to make your lives better. That will help people like him. Reporter but clintons attempts to focus solely on trump complicated by her ongoing primary battle. Tonight our news nbc poll is showing Bernie Sanders is now just two points down in california. Sanders still drawing huge crowds crisscrossing the state. I saw Hillary Clinton racing to california. Bill clinton racing to california. Maybe they think this campaign is not quite over. Reporter to sanders point, clinton has rearranged her schedule to head back out to california tomorrow sooner than expected and shell deliver a speech on foreign policy. Again attacking trump. Kristen welker on the trail for us, thank you. There is little relief in sight tonight in south texas where historic floodwaters have overwhelmed entire communities. Triggering more water rescues today. And there are new concerns that one of the hardest hit areas may never fully recover. Exhausted residents brace for more. Nbcs Gabe Gutierrez is on the brazos river for us tonight. Reporter its home is where the heart is. Tonight more of texas is heart broken. Just total devastation. Reporter before the Farming Community looked like this. Now authorities estimate about 80 of it is either damaged or destroyed. Including 300 homes in this subdivision. Ft. Bend county showed us the Valley Lodge Subdivision where some 300 homes are underwater. This town has never seen anything like this. No, they havent. Now the real question will be for the 800 or so citizens out here, are you going to rebuild. Reporter the historic floods crippling the state. This jeep swept away by the raging waters. Today near dallas, even more heavy rain. First responders rushing to rescue drivers. Im not leaving the house. Reporter a rescue mission of his own. The floodwaters already claimed his house in richmond. But after living in texas all his life, no soaking would stop this cowboy from checking on his neighbors. Thats what we do around here. Weve always helped each other. Its slick. Dont fall down. Reporter it isnt long before he finds Nancy Gonzalez and her son trapped. The water had just crept into their home. Ever seen a flood like this . Never. Reporter tonight this family is safe. Finally on dry land. But the toll in texas is mounting, with more storms predicted through the weekend. Gabe gutierrez, nbc news, richmond, texas. Troubling news tonight concerning the zika virus. A baby has been born in new jersey with a severe birth defect linked to zika. The first case in the continental u. S. Made public but the Health Officials are quick to point out the babys mother did not contract the virus in this country. Nbcs Anne Thompson now with the details. Reporter this new jersey hospital is where a 31yearold woman from honduras delivered a baby girl afflicted with microcephaly caused by the zika virus. Doctors say the mother contracted the virus in honduras and then came to the United States specifically for care. Quite frankly, its catastrophic for a young, healthy patient whos seeking to get pregnant, or is pregnant, to counter this. Reporter the cdc is currently following 300 pregnant women in the u. S. And its territories who contracted zika. New york mothertobe Andrea Osbourn traveled to jamaica while she was pregnant and is now closely monitored. Though tests have been negative for zika so far. It is pretty scary. Because Everyone Wants to have a healthy child. And to know a mosquito can cause all this is crazy. Reporter pregnant women exposed to the zika have a 1 to 13 chance to giving birth to a baby with microcephaly. Today the cdc warned again that pregnant women or women who could become pregnant are told to avoid traveling to central and south america, and parts of the caribbean, including puerto rico. The infected mosquitoes are not in the u. S. Yet, but officials are on alert. I wouldnt be surprised if we have a small local outbreak of people who actually get infected while in the continental United States without leaving it. Reporter trying to protect americans against an epidemic, still unfolding in other parts of the world. Anne thompson, nbc news. Still ahead tonight, a major new fda alert about all the salt we may be eating without even knowing it. What the government is doing to drastically cut the sodium hidden in our diets. Also, a startling new warning about the top distraction for teens behind the wheel, and surprise, its not cell phones. Its dinnertime and you may be reaching for that salt shaker, but the fda is hoping this next story will give you pause. The agency is out with dramatic new guidelines sharply reducing how much salt is recommended, saying americans are consuming too much sodium, and getting it from foods where they may least expect it. Nbcs rehema ellis has the story. Reporter in a sweeping proposal years in the making, today the fda called for a sharp reduction in the sodium found in 150 categories of processed and restaurant food. Why . Americans consume on average 3,400 milligrams of sodium a day, about 1 1 2 teaspoons of salt. The proposed guidelines would cut that by onethird over the next decade. A major effort, because more than 70 of sodium consumed is already in food before it reaches the table. Some surprising culprits . Salad dressing, bread, and cereal. Medical experts today saying limiting sodium is important for americas health. One out of three americans suffers from high blood pressure, even one out of ten children. If you have high blood pressure, try to reduce your salt intake. If youre otherwise healthy, and have a low blood pressure, you may not need to worry about salt. Reporter today the Grocery Manufacturers Association called for more research into the acceptable range of sodium intake for optimal health. If youre taking the salt out, what can you put in food so it still tastes good . Theres a lot of different ways to flavor food that doesnt require salt. You can do dried herbs or fresh herbed, or onions or garlic is really good. Reporter all part of an effort to cut americas craving for salt. Rehema ellis, nbc news, new york. Up next, searchers may have gotten the break they were hoping for in the hunt for a crashed passenger plane. A potential big break in the search for the egyptair flight that crashed nearly two weeks ago. A ship has picked up signals believed to be from the planes black boxes. The search has been narrowed to a threemile radius in the Mediterranean Sea where waters run as deep as nearly 10,000 feet. The cause of that crash remains a mystery. A big new study out tonight with the surprise about teens and distracted driving. Aaa monitored thousands of teens with dashboard cameras over a period of eight years, and researchers found the main be source of distraction was not texting, which remains a dangerous problem, of course, but its actually the passengers in the car that factored into most distracted driving crashes. When we come back, the hollywood icon who would have turned 90 today. Why the mystique of marilyn still lives on. Vo a massive manhunt in fremont going on right now for at least one armed suspect who shot and injured two officers. Authorities are updating the conditions of the officers right now. Well have the latest from the press conference. Next close next at 6. Finally tonight, a hollywood legend who would have celebrated her 90th birthday today. Marilyn monroe, the blond bombshell who lit up the Silver Screen in the 50s and 60s is still just as famous as ever. Nbcs Cynthia Mcfadden looks at why marilyns memory lives on all these years later. Reporter Marilyn Monroe played the dumb golddigging blonde so well, people often thought it was who she was. I always say a kiss on the hand might feel very good, but a diamond tiara lasts forever. Reporter today fans paused on the hollywood walk of fame to remember what would have been the actress 90th birthday. Which raises the question why, why does endure . In part because she represents the attitude about women and sex in the 1950s. Sometimes bold and brassy, sometimes sweet and vulnerable. Perhaps, too, because while shes been copied and parodied over the years, she has never been matched. Born in 1926, she grew up with foster families, wedding for the first time at 16. Marriages to baseball star joe dimaggio and playwright arthur miller. At age 36 she made one of her most famous personal appearances. Happy birthday, mr. President reporter her vulnerability not an act. She would be dead three months later for a drug overdose. Among her troubles, her belief she was not taken seriously as an actress. In her last interview two days before her death, she pleads, please dont make me look like a joke. Her fans have made sure of that. Cynthia mcfadden, nbc news, new york. That will do it for us on this wednesday night. Im Savannah Guthrie in for lester. Ill see you tomorrow morning on today. Have a good night. Nbc bay area news begins with breaking news. And its scary. Its going to be scary to go to bet tonight. Right now we are in a mode of going out and searching yard to yard door to door to find out whether where the suspect responsible for this shooting is. An officer o not a manhunt for a gunman. Police officers scouring a neighborhood for at least one man accused of shooting two Police Officers. Good evening, everyone. Im jessica aaguirre. Officers are scouring the neighborhood for that gunman. Lets take to you the nbc chopper. These are live pictures. This is the Irvington District usually congested on any given day. But look closely. Down below it is closed to the public yet filled with hundreds of officers searching for this gunman. This all started as a traffic stop around 1 30 this afternoon. Police say the driver ran a patrol car and shot an officer. That suspect then fled on foot. Moments later, another officer was shot. Here is where it is all happening. Started and ended at safeway parking lot in the intersection of washington boulevard and roberts avenue. This is five corners area. Now we have a team of reporters at the scene and at the hospital where officers are recovering. Lets begin with nbc bay areas lulu tan. We saw the News Conference held by the police department. Update us. Reporter yeah, jessica. They say that both officers were shot. We