A tornado took direct aim at may field, kentucky, and this is how randall reid saw it on the job at shelby auto moitive. Holy mackerel there goes that holy shoot oh, my goodness pelley more frightening scenes are on the way as the system heads east. Manuel bojorquez is on the trail of the twisters. Oh, looka that look at that reporter the tornado that touched town in mayfield in western kentucky late this afternoon seemed to slice through part of town, kicking debris into the air. Oh, my god reporter its the same system that produced this. Oh, no its hitting that farm reporter the deadly tornado that roared through garvin county, oklahoma monday. Today, the National Weather service said it was at least a category ef3. That means the violent vortex that uprooted trees and flatepped homes had winds up to 165 miles per hour. Daylight revealed the damage stretches for miles in parts of southern oklahoma. Lisa buckners home in winnewood was wiped off its foundation. Everythings gone. Everything. Reporter her 76yearold neighbor is one of two deaths here. He did not have a storm shelter. Buckner had this one built three years ago. When you had that cellar put in there, did you ever think youd have to use it . No, no. Not really. But it was there for security. And it saved my life. Reporter destruction like this has prompted oklahomas governor to declare a state of emergency in 15 counties. Scott, may is the prime month for tornadoes here, and there is a chance of Severe Weather again later this week. Pelley manuel bojorquez, thank you very much, manuel. Now, wed like you to see an important cbs news investigation into the exploitation of the most Vulnerable People on earth. Weve been telling you about the five million syrians on the run from their civil war, and the u. N. Estimates that more than one million of them are children. Theyve risked death to reach turkey, but Holly Williams has discovered refugee children pressed into sweatshop labor for little more than 50 cents an hour. Reporter in a Textile Factory in istanbul, workers toil over sewing machines. But look closely because these workers are children. Filming with a hidden camera, we found scores of factories using child labor in turkey. Most, perhaps all of the children, from syria. Some told us they were as young as 11, refugees from a war now easily exploited. A turkish worker on the minimum wage earns around 450 a month. A syrian child working 12 hours a day earns as little as 160. At a school for syrian children in istanbul, these boys, aged 10 to 12, are just beginning to learn to read and write because until recently, most of them were fulltime workers. How many of guys have worked . Wow. The schools founder, shafik suleyman, told us he offers free tuition to encourage parents to send their children back to class, but sometimes thats not enough. Parents arent earning enough money to feed their families. No. So they have to theyve been forced to send their kids to work. Reporter out of desperation. Yes. Yes. Theyve got no choice. They have to send their children. Reporter leyla akca is a psychologist who treats syrian child refugees and their families and told us many factories prefer to hire children over their parents. You can overwork the children, and theyre not going to be oppositional. Theyre not going to ask for their rights. They dont know their right so, theyre just going to work like slaves, and its easier to keep them as slaves than doing it to an adult. Reporter turkey has taken in around three million syrian refugees, spending billions of dollars to shelter and feed them. But while theyre safe here, theres very little stable work and not much hope of building a future. Thats why so many syrians have risked their lives in rickety boats to reach europe, but now the European Union has promised turkey nearly 7 billion in return for its help stopping the refugees, and the crackdown has worked. For syrians, the door to europe has slammed shut, but the factories that prey on them appear to be operating with impunity, and hundreds of thousands of syrian children in turkey are growing up illiterate and powerless to change their fate. Holly williams, cbs news, istanbul. Pelley the flight of refugees from syria led donald trump to call for a temporary ban on muslims entering the United States until, as trump put it, we find out whats going on. Well, one of the worlds most prominent muslims believe thats trump has no clue whats going on. Heres Mark Phillips. applause reporter sadiq khan was apparently not the sort of Muslim Donald trump had in mind when he announced his proposed ban. Hello, london reporter khan has just been elected mayor of london, the first muslim mayor of a major western capital. So would he, like all other muslims, be band from the u. S. Under the trump plan . Not necessarily, trump told the New York Times in an interview. There will always be exceptions. Sadiq khan has now told donald trump what to do with his exception. I think donald trump has ignorant views about islam. Its not just about me. I dont be the exception to be allowed to go to america. Reporter and he doesnt want to take lessons from donald trump on how to deal with islamic extremism, either. Trumps way, khan says, is the wrong way. And my concern is hes playing into the hands of extremists who say its not compatible to be western and to be mainstream muslim. I think london showed last thursday it is. Reporter sadiq khan was elected with the largest majority any london mayor has ever won, and this despite having to defend himself against the claim he was sympathetic to extremist views. Khan said his opponents campaign was run right out of the donald trump playbook. Normally, scott, foreign politicians stay out of american domestic politics, but sadiq khan has made an exception. In a presumed contest between donald trump and Hillary Clinton, khan says he hopes she thrashes him. Pelley Mark Phillips at the house of parliament tonight in london. Mark, thanks. Well, Hillary Clinton might have a chance to thrash trump if he doesnt begin winning the financial back of his party and the support of its leaders. Major garrett tells us that today, trump was tormented by the ghosts of campaigns past. Well, it is great to be back in the welcoming embrace of washington. Reporter senator ted cruz returned to washington today after ending his president ial bid a week ago. Cruz declined to back his partys presumptive nominee. Will you endorse donald trumply or do you rule that out entirely . There will be plenty of time for voters to make the determination who theyre going to support. Reporter trump, whose views on trade, immigration, anderation the minimum wage bucked g. O. P. Ideology, can only find lukewarm republican support on capitol hill. On thursday, trump will meet with House Speaker paul ryan, who has withheld his endorsement. Hell also talk with Senate Majority leader mitch mcconnell. Do you share some of your colleagues anxiety about what donald trump means to your party as the presumptive nominee . Hes won the nomination the oldfashioned way. He got more votes than anybody else, and we respect the voices of the republican primary voters across the country. Reporter New York House republican and trump ally chris colins is trying to change minds. Collins holds weekly peteings to persuade rank and file republicans trump is their ticket to victory. Were moving people along, some very easily, some very quickly, others, whats the message . Reporter do you have people who are curious and want to be persuaded or curious and still very reluctant . We have some of everything. Reporter interviews with nearly a dozen Congressional Republicans showed gradual, begrudging Movement Toward trump. Scott, that evolution was driven more than anything else by survailz today show trump running neck and neck with Hillary Clinton in florida, ohio, and pennsylvania. Pelley Major Garrett on capitol hill. Major, thank you. Its not just trump Hillary Clinton is running against. Bernie sanders refuses to say die, and tonight, democrats are voting in west virginia. Heres nancy cordes. Now, secretary clinton says my idea is too big. Reporter in stockton, california, today, sanders took on clinton as if they were neck and neck. We have a chance to end up with a majority of the pledge delegates. Reporter its a slim chance that would involve him winning an unprecedented twothirds of the remaining pledged delegation. Still, his hot streak this late in the game is bad optics for clinton. Shes the one whos proven she can get it done. Reporter so today, her campaign started airing ads again in the next state up, kentucky, after pulling them to save money. Learning how to you swaddle a baby, you know, thats an art form. Reporter at a daycare in lexington, kentucky, clinton laid out her plan for new federal subsidies to cap child care spending at 10 of family income. The proposal is aimed at winning over the kind of progressives who are still stuck on sanders. Do you envision all these families will get these subsidies, including wealthy families. Well, it will be a sliding scale like most programs are, but i think that a lot of the cutrawfs too low given the costs that families are facing and given, particularly, the high cost of child care. Reporter clinton notes she had her own late surge in 2008 winning six of the final nine contests before conceding to president obama. His Vice President , joe biden, said today for the first time, scott, that he is confident that clinton will eventually be the partys nominee. Pelley nancy cordes for us tonight. Nance, thank you. Theres an Important Development in a story we brought you last month. Victims of lead paint poisoning had told us that they had been tricked out of millions of dollars in settlement money. Well, today, marylands attorney general sued several finance companies, and he sat down with one reporter, anna werner. This set of circumstances makes my blood boil. Reporter for Maryland Attorney general brian frosh, the conclusion, after a sevenmonth investigation, is clear it looks to me like sophisticated and very aggressive folks targeting the most Vulnerable People in our society, people who are poor, people who are cognitively impaired, and people who are young and unsophisticated. Reporter hes now suing Access Funding and related entities, alleging they duped at least 74 victims of lead paint poisoning in baltimore, people like crystal linton, who suffered lead poisoning as a child and was left functionally illiterate. To safeguard her future she received a 630,000 settlement. But after getting fliers from companies promising quick cash of course lynton sold her future payment stream, then valued at 408, 000, for just 66,000, some of it to Access Funding. Do you feel like you understoo understood no. Reporter how it worked . No. Reporter so you dont know how you signed away your money essentially . No. Reporter just like that, her money was gone. It hurts. It was exploitation in its worst form. Reporter the attorney general says 17 million in payments to victims vanished. Now, through the lawsuit, hes trying to get their money back. What would you say to people who say, hey, you know, what . These people are adults. They made their own decisions to sell these settlements so thats life. Sadly, that may end up being the case for many of these people. Reporter attorney earl nesbitt is with the National Association of settlement purchasers and represents some of those companies in court. Its very unfortunate what happened in maryland, but it would be, i think, a mistake for anyone to judge the entire industry or every transaction about what happened in an isolated place involving a particular funding company. Reporter do you trust when the industry says, well, its only in maryland. I would be astonished if it were only happening here. Reporter we reached out to principals from Access Funding but have not heard back tonight. But in Previous Court filings, the Company Called the attorney generals allegations incorrect and scurrilous. The company says it made disclosures and these were voluntary sales, all approved by the courts. And, scott, the Company Claims it actually lost money in its two years of transactions. Pelley anna werner with the exclusive. Anna, thanks very much. Still ahead, breaking news tonight in the death of prince. And. Now, let me ask you this, wheres the weed at . Pelley do deadly crashes rise where weed is legal . When the the cbs evening news continues. Kept coming back on my longterm control medicine. I talked to my doctor and found a missing piece in my asthma treatment with breo. Oncedaily breo prevents asthma symptoms. Breo is for adults with asthma not well controlled on a longterm asthma control medicine, like an inhaled corticosteroid. 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For drivers with accident forgiveness, Liberty Mutual wont raise your rates due to your first accident. Liberty mutual insurance. But zzzquil is different have Pain Medicine because why would you take a Pain Medicine when all you want is good sleep . Zzzquil a nonhabit forming sleepaid thats not for pain, just for sleep. When agerelated macular have degeneration, amd we came up with a plan to help reduce my risk of progression. And everywhere i look. Im reminded to stick to my plan. Including Preservision Areds 2. My doctor said Preservision Areds 2 has the exact nutrient formula that the National Eye Institute recommends to help reduce the risk of progression of moderate to advanced amd. After 15 years of clinical studies. Preservision areds 2. Because my eyes are everything. With a sobering report on driving high. Deadly crashes are up where weed is legal. Four states, plus d. C. , allow marijuana for recreational use. Medical marijuana is available in 20 more. Kris van cleave has more on this. It was not on my radar. And what it took to put it on my radar was the death of my 23yearold child. Reporter its been nearly three years since mary gastons son, blake, was hit and killed at a bellevue, washington, intersection by a driver who was high on marijuana. He was laying in the middle of the intersection on the ground. He had a massive head injury, so he was he was bleeding out. Reporter in 2012, washington became one of the first states to legalize marijuana. Now a new study by a. A. A. , found the number of fatal accidents involving drivers who had recently used pot more than doubled between 2013 and 2014. The study also found currently there is no reliable test to determine the amount of marijuana in the bloodstream that leads to driver impairment. Jake nelson is the a. A. A. Foundations director of research. Biologically, can bass and alcohol are very important, and i think policy makers are trying to do the right thing, trying to establish Something Like a. 08 for can bass, and there is not science to support it. Reporter this dash cam video shows a speeding driver cutting through traffic and struggling to maintain his lane. Reporter a 2015 report found crash risks associated with pot are highly influenced by other factors including age and gender. Scott, more than a dozen state are considering measures to legalize marijuana. Pelley kris van cleave thanks. Well be back in a moment. Frustrated with your overactive cant handle the side effects . Botox® treats symptoms of leaking, going too often, and the strong sudden need to go. Ask your urologist if botox® can help calm your bladder and reduce your daily leakage episodes. The effects of botox® may spread hours to weeks after injection, causing serious symptoms. 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