Since launching his campaign, former Vice President joe biden shared a stage with fellow contenders today. If im your nominee, i man on winning georgia, North Carolina, south carolina. Reporter the tracker roll shows bide season the first choice of democrats and leads in iowa, new hampshire, and south carolina. But there was some skepticism about bidens standing after his appearance at a forum on poverty in washington. Doesnt do for you . No, he doesnt do it for me. If i have to, i will vote for him, though. Hes riding on the reputation of his name recognition. Its time to see whether he has anything to offer us. Reporter meanwhile, massachusetts senator surging. So is mayor pete buttigieg, a virtual unknown six months ago, his campaign raised 7 million in april. Its safe to say im not like the others. Reporter one poll shows as many as five democrats topping President Trump in a hypothetical matchup. Were getting tremendous polls. Reporter the president is urging his supporters to ignore early polling that show him trailing biden. Those polls dont exist. I just had a meeting with somebody that is a pollster and im winning everywhere. Reporter this weekend, the campaign fired the three pollsters responsible for the internal surveys. Amid the shakeup, President Trump is set to launch his 2020 reelection bid tuesday in orlando. Florida is a mustwin for the president if he hopes to keep the white house. More than 7 in 10 democrats say they want to hear from democrats about plans to cut health care costs. Maurice . Thank you very much tonight. Syrias government has begun a new Bombing Campaign in one of the last remaining areas it does not control after more than eight years of civil war. Cbs news gained rare access inside idlib process. Holly williams filed this report. Reporter in idlib, the terror rains down from the sky. They have no defense here against Syrian Regime and russian air strikes. This was a ceasefire declared a few weeks ago but broken almost immediately. There have been air strikes and shelling of civilian areas in the last 24 hours. As we drove deep into idlib, warnings came of regime jets overhead. Where are the planes . How many planes . Two planes . Our guide is a media activist. Hes documented how proregime forcespeatedly hit hospitals. The Medical Clinic was attacked just hours earlier, he told us. This was a clinic . Yeah. Reporter so women and children . Exactly. Theres a clinic and houses around it. Reporter why did they target this street . I dont know. Reporter hundreds of thousands have fled the bombing and taken shelter in this sprawling refugee camp. On its edge, we found this woman and her eight children, who left their home with nothing. Mawa is pregnant and said she plans to give birth here on the dirt. I have no nobody, and theres no going back. There are a million children in idlib, innocent and too young to understand this war. But menace from the skies alongside their parents. Holly williams,cbs news, idlib. And later, a Court Appearance know what turns me on . My man. Some vitamin d. A little. Inspo. And when i really want to amp it up we use ky yours mine. Tingling for me and warming for him. Woah. Get what you want. An 8yearold boy in North Carolina is recovering from a shark bite. Hes one of three people who were attacked this month in that state. Rte t 8arld rtly to boys injuries were not horrific. But two weeks ago, a shark attack cost 17yearold paige winter her left leg. Her father, charlie winter, rescued her. It was a big shark. And kind of thrashed a little bit. And it had just a big eye staring at you. Reporter shark attacks are still rare. Worldwide last year, there were 66 unprovoked shark attacks and four fatalities. North carolina averages three shark attacks a year. So three attacks in two weeks sounds like a lot. More people in the water in their habitat. We have a Large Population of sharks. I cannot say that Climate Change has anything to do with why these sharks are off our beach. Reporter this is where they belong. This is shark habitat. Reporter there are more sharks off the carolina coast. Warming waters are changing their migration period some studies suggest. There are roughly 50 species of sharks off the coast of North Carolina at any time. Some swim in waters as shall he as waist deep. These incidents are extremely rare. And its unfortunate that shea shed negative light on a species that is in such trouble. Reporter he says if youre in the water and see a dolphin, head to shore. And rip currents have already drowned seven people off North Carolinas coast this year. Mark strassman, thank you. Coming up in just a moment, the o. J. Simpson case 25 years later. vo r. My digestive system used to make me feel sluggish. But those days are over. Now, i take metamucil every day. 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Mmm another american has died o the eighth since last year. 55yearold joseph allen of new jersey was found dead in his hotel room on thursday morning. He was staying at a resort on the north coast. The cause of death is not known. In hong kong today, thousands of young people took their protest to the office of the chief executive, demanding that she step down for supporting a plan to send criminal suspects to Mainland China for prosecution. The protest march sunday drew nearly 2 Million People, about a third of hong kongs population. An arkansas woman was ae ra arraigned today for murdering collins. Odonnell was a friend of collins and a witness at her divorce trial. 25 years ago tonight, o. J. Simpson led the police on a lowspeed chase through southern california. He was wanted for the murders of his exwife, nicole, and her friend, ron goldman. But simpson took off in that ford bronco. Simpson is 71 now. This past weekend he opened a twitter a little respect Gloria Vanderbilt died today. She was 95. It seemed as if her entire life played out in the gossip columns, from tragedy to turning blue jeans into high fashion. Heres the first movie of gloria herself. Reporter from an early age, Gloria Vanderbilt was scrutinized and glamorized. She lost her father at age 2. At 10, became the center of a sensational custody battle between her mother and her aunt. She never liked what the papers called her, the poor little rich girl. Her childhood left her feeling isolated. I think many of us who have not had a family, a mother and a father, do have a sense of alienation and a sense of not belonging. Reporter a mother of four, Vanderbilt First married at 17, and had three more husbands. Her happiest marriage, she sai s was with wyatt cooper, father of cnn correspondent anderson cooper, and carter, who died in 1988 from afternoonn apparent s. After carter died, i didnt think i was going to go on living. Reporter her name propelled her fashion empire into a 100 million business. Founded on those jeans. These would be fascinating to read. Reporter wh what an extraordinary life. What an extraordinary mom. Reporter cooper gave a touching tribute to his mother. Every time i kissed her goodbye, i would say i love you mom. She would look at me and say i love you too, you know that. And she was right, i did know that. That is the overnight news for this tuesday. For some of you the news continues. For others, check back with us for the morning news and cbs overnight news. This is the cbs overnight news. Welcome to the overnight news. President trump kicks off his Election Campaign in florida. He narrowly won the state in 2016, but polls show him trailing joe biden in florida, as well as the battleground states of pennsylvania and wisconsin. The Trump Campaign says the polls are old. The president says they dont exist. In any event, three of the pollsters were fired. I believe we can win texas and florida. Reporter for the First Time Since launching his campaign, former Vice President joe biden shared a stage with fellow contenders today. If im your nominee, i plan on winning georgia, North Carolina, south carolina, believe it or not. Reporter the tracker roll shows bide season the first choice of democrats and leads in iowa, new hampshire, and south carolina. But there was some skepticism about bidens standing after his appearance at a forum on poverty in washington. Doesnt do it for you . No, he doesnt do it for me. If i have to, i will vote for him, though. Hes riding on the reputation of his name recognition. Its time to see whether he has anything to offer us. Reporter meanwhile, massachusetts senator elizabeth is surging. So is mayor pete buttigieg, a virtual unknown six months ago, his campaign raised 7 million in april. Its safe to say im not like the others. Reporter one poll shows as many as five democrats topping President Trump in a hypothetical matchup. We havent even started yet, but were getting tremendous polls. Reporter the president is urging his supporters to ignore early polling and disputes polling numbers leaked last week, showing him trailing biden in several states. Those polls dont exist. I just had a meeting with somebody that is a pollster and im winning everywhere. Reporter this weekend, the campaign fired the three pollsters responsible for the internal surveys. Amid the shakeup, President Trump is set to launch his 2020 reelection bid tuesday in orlando. The cold war between the Trump Administration and iran is about to heat up. Iran says that by the end of next week, it will have more enriched uranium on hand than is allowed under the nuclear treaty. President trump pulled the u. S. Out of that treaty. What does this all mean for peace in the region . David martin explains. Reporter the two tankers could be seense High Resolution photos taken from a u. S. Navy helicopter several hours after the explosions, which disabled them. An iranian patrol boat is alongside the tanker, and according to the pentagon, removes an unexploded mine attached to the hull. These photos show one of the magnets Officials Say was used to attach the mine to the hull. Still stuck to the ship. The same scene was recorded in grainy video by a u. S. Patrol plane and released last week to back up u. S. Claims iran is responsible for the attack. Many allies remain unconvinced. But the democratic chairman of the House Intelligence Committee says theres no question iran is to plane. Iran announced it is increasing production of our rainium. Another day of protests in hong dock where residents are up ins. Thousands gathered outside the city Leaders Office demanding she cancel the legislation. This comes after protests that saw more than 2 Million People on the streets. Reporter hong kongers hit the street with mass fury sunday, demanding their government revoke a hated extradition law that could send them to chinas legal system and calling for the resignation of their chief executive, appointed by bj. Beijing. After sunset she did apologize but only on paper. With cell phone lights shining the way, this was a 21st century protest. Spurred by recent violent clashes where dozens of protesters and pole were hurt, and the First Casualty when this protester fell to his death saturday. The opposition legislator says beijings image is fractured. Now they are losing control in hong kong. So it shows theres a weakness on the part of the chinese regime. Reporter but mainland citizens never saw. Chinese state media had a special report on blood supply. While foreign media in the country went black, thanks to chinas sensors. Back here in hong kong, the government and opposition are trying to figure out what to do next. Beijing reiterated its support for carrie lamb. After eight years of civil war, the conflict has faded from the Enter National spotlight, but just this week, the government unleashed a massive offensive in idlib. Holly williams filed this report. Reporter in idlib, the terror rained down from the sky. There was a ceasefire declared just a few days ago, but broken almost immediately. There is air strikes of civilian areas in the last 24 hours. As we drove deep into idlib, warnings came of regime jets overhead. Where are the planes . How many planes . Two planes . Our guide is a media activist. Hes documented how proregime forces have repeatedly hit hospitals. Despite condemnation from the united nations. The Medical Clinic was attacked just hours earlier, he told us. This was a clinic . Yeah. Reporter so women and children . Exactly. Theres a clinic and houses around it. Reporter why did they target this street . I dont know. Reporter hundreds of thousands have fled the bombing and taken shelter in this sprawling refugee camp. On its edge, we found this woman and her eight children, who left their home with nothing. Mawa is pregnant and said she plans to give birth here on the dirt. I have no nobody, and theres no going back. There are a million children in idlib, innocent and too young t. But menace from the skies alongside their parents. Holly williams, cbs news, idlib. The cbs overnight news will be right back. This is the cbs overnight news. The department of agriculture has earmarked another 16 billion in direct payments to farmers, who have been devastated by President Trumps trade war with china. Farmers who grow soybeans have been hit the hardest. But some are growing from the trade war. Reporter its a Northern CaliforniaCommunity Best known for its biggest product. Gilroy is almost synonymous with garlic. Theyve been peeling and planting it here for decades. If the root plate is still in tact, you have california garlic on your hand. Reporter christopher farms is the nations largest garlic grower and just one of three u. S. Producers. A glut of c others out of business. Since 1993, chinese exporters have flooded the market can over 600 million of dumped chinese garlic. Reporter quarrgarlic growere been benefiting from the tariffs. Shoppers will find u. S. Garlic more expensive, but the price difference will be smaller. I predict well see a 25 increase in demand for california garlic, so were going to invest in additional acreage and more jobs. Reporter many farmers rely heavily on exporters to china. Its getting tough. Sit a shame they put them retaliatory tariffs on us. Reporter soybean producers have seen sales plunge 25 . Corn based products, and pork have also taken a hit. In a broader sense, a trade war is not what xactly what we need. Reporter one bright spot in a battle for the bulb. Cbs news, los angeles. The federal government is teaming up with silicone valley trying to come up with a defense of deep fake videos. Youve seen the clips, manipulated by software to change the message. Jonathan vigliotti reports. Im sorry for that. Reporter when it comes to deep fakes, even game of thrones lead character isnt immune. This shows him apologizing for the finale. While some of these videos are designed to entertain, others are raising concerns. In this deep fake, Mark Zuckerberg appears to be speaking about global domination on cbs news digital platform. Imagine this for a second. One man with total control of billions of peoples stolen data. Reporter despite asking the company to take the video down, the company refused. 20 years ago, we worried about fake content in a court of law, but we didnt worry about it going live on twitter or facebook. Reporter hammi fareed. We take the video, we track head movements. Reporter he gave us a look at his Software Movement that compares real videos to altered ones. He wants to off it to help detect deep fakes ahead of the elections. Then we asked how distinct are they and can they distinguish from the real to the fake. We will run the videos through our analysis and tell us what you think. Do you worry its a drop in the buck net of course. The solution is not just technology. The solution is technology, good reporting, better digital citizens, better companies, better policies. Then he had a press conference in the rose garden. Reporter this altered video of nance pelosi, which falsely showed her slurring her words, has been viewed more than 3 million times. The Speaker Pelosi video was not funny. It was meant to impugn her and create chaos. And it worked. Reporter facebook tells cbs news, leading up to 2020, we know that combatting misinformation is one of the most important things we can do. We continue to look at how we can improve our approach and thele isah and thele is s thele isystems we built. At a House Intelligence Committee meeting last week, federal officials expressed concern that theres no easy fix. The audience im most worried about is not young people on social media, it is the older generation who has come t