Nightly news begins now. Good evening. It is a small world. No one knows that better than knows who watch the value of their savings and retirement accounts take another steep drop today. All because of chinas economic problems. The dows 392point drop today brings losses for the first four trading days of the new year to 911 points or more than 5 . If it has us asking if chinas woes can trigger those kind of losses in this country, what does it say about the health of our economy . Nbcs Anne Thompson finds out. Reporter another bungee jump for the nations stock market. The dow plummeting more than 300 points at the open, bouncing back in the late morning, only to plunge again by early afternoon. Investors grabbing fistfuls is the slowing growth in china, the worlds second largest economy. Today trading on chinas stock market halted for the second time this week after a major selloff. I think its premature to be overly concerned. Financial markets are fickle. I think in the end, fundamentals are really what matters for the u. S. Economy. Our fundamentals are rock solid. Reporter economists point to the improving jobs and housing market. Still the chaos in china is fueling the u. S. s markets to the worst year ever shrinking the 401 k by 2 today, losing about 4,000 this week. January is a prombarometer for the future. Predicting with 87 accuracy what the market will do the rest of the year. One more reason main street needs to watch Anne Thompson, nbc news, new york. Jim cramer is the markets go up and down. People feeling nervous right now. What do you tell them . Panic never made anybody a dime. I totally understand why people would be concerned. China is a huge economy. A lot of the United States is good but our companies that do a lot of business in china, particularly manufacturing arent doing well. I think there are some stocks that are not good to have. Im not in a hurry to commit new capital to this market. Jim cramer tonight, thanks. Well see you for cnbcs special coverage markets in turmoil. Turmoil. 7 00 p. M. Eastern time. Donald trump unleashed an attack on hillary and bill clinton. Tonight tens of thousands are expected at a trump rally at a venue that can only hold 400,000. Donald trump flexing his muscle in the unlike lest of Bernie Sanders country. Giving out 20,000 free tickets to a 1,400 capacity seater, 163 steps away from sanders own campaign headquarters. If this was a Different Event like a phish concert we would cancel it. Reporter trying to prove his crossover appeal while atabbing the democratic frontrunner. I want to start focusing on hillary. John releasing this instagram ad insinuating Hillary Clinton isnt a supporter of women. Womens rights are human rights. Reporter Kristen Welker was on the trail today with bill clinton in iowa. Donald trump is again today making an issue of your past transgressions. Do you want to respond . Are you worried your past could hurt your wifes campaign . I dont have any response. If he wins the nomination, well have plenty of time to talk about it. Reporter trump kept raising birther doubts about ted cruz eligibility. Get a declare try judgment. John mccain is agreeing. I think there is a question. Im not a constitutional scholar on that. But i think its worth looking into. Reporter cruz responded, mccains comments came as no surprise. Im not going to take legal advice from donald trump. Reporter in vermont, the trump show is drawing a big crowd, but not necessarily a loyal one. We want trump out of our town. Reporter first in line at 4 30 this morning when it was only 15 degrees out, mark conrad, a supporter of, you guessed it, Bernie Sanders. Only in vermont would a democrat be the first in line to see donald trump. I expected people to be here. Reporter so why is donald trump here . The state votes on march 1st. You can say look at the massive crowd i can draw here right under Bernie Sanders nose. Vermont used to be a reliably red state, only voting for a democrat once since the 1850s. In 1992, they voted its been blue ever since. Katy, thank you. Tonight families across the country sit down to dinner, there is new controversy over the american diet. The government is out with new guidelines, the first update in five years over what we should eat and what we should avoi this year there is a big push for all of us to cut back on americas sugar addiction. As tom costello reports, not everyone is happy about surprises left off the warning list. Reporter with a registered dietician in the home, they are already focused on eating the right foods. A little bit of beans. Reporter today the governments Top Health Experts said most americans can do better. Among the dietary recommendations, cut way back on sugar. Hidden in everything from prepackaged soups to salad dressing to pasta sauce. One jar of pasta sauce can contain the equivalent of a candy bar in sugar. When youre cooking at home, you can control sodium and sugar. Help reduce sugar intake as much as possible. Reporter the new dietary guidelines call for sugar to make up no more than 10 of our daily calories. All of us have to Pay Attention to labels. The governments my plate nutrition guide sounds familiar, more fruits and veggies, lean protein, whole grains and lowfat dairy. A lot less salt. You should think about what you should do to eat and prevent diseases and also to Save Health Care costs. Reporter critics say the guidelines dont go far enough. Based on new science, the government is dropping its recommendation to limit egg consumption and declined to steer people away from red meat. The American Institute for Cancer Research saying it was dismayed that lobbying efforts superseded scientific evidence. Has the food lobby had an oversized role setting these guidelines . I think we have a strong set of recommendations that are not impacted in any undue way but listened to all the voices. Industry criticized the recommendations to cut sugar consumption. What is your favorite vegetable . Reporter a healthier diet, one plate at a time. Tom costello, nbc news, washington. A state of emergency has been did he claired in a Los Angeles Suburb where a natural gas leak has been releasing tons of methane gas into the air every day for months now. It could be months more until its finally fixed. As joe fryar reports, the danger has driven thousands of people from their homes. Reporter its an affluent los angeles neighborhood, but it ghosttown. Out. Lives and health disrupted by a gas october. My eyes were burning and it was watering and itching. It was to the point that my vision was reporter this family has been living in a hotel for four weeks now. The first week i single day because it was such a hard experience on me. Reporter angry homeowners, some wearing gas masks held protd protests. The Southern Gas Company says there are no longterm health effects. There are clearly shortterm impacts for some people sensitive to odors. Reporter the company is drilling relief wells hoping to stop the leak. Now californias governor is declaring a state of emergency, stepping up inspections and saying the company should cover all costs. Well do whatever it takes to protect the people from underground gas storage. Reporter two schools recently relocated. The faa ordered a nofly zone over the neighborhood and famous environmental activist erin brock vich is Holding Community meeting. This is the biggest air contamination ive ever seen. The magnitude is almost overwhelming. Reporter last the gas Company Released timelapsed video showing methane descending on porto ranch saying it is releasing 7,600 tons of methane gas into the airedaly, about 25 of the methane emitted in all of california each month. An invisible invader with a visible impact. So cal gas is paying to relocate people and say it reduced the amount of gas and hopes to have the leak stopped by late february or march. In paris on the anniversary of the terror attack on charlie hebdo, a man wielding a butcher knife was shot and killed outside a police station. He had a fake explosive device and a piece of paper with an image of the isis claim and he claimed responsibility for the attack hes trying to carry out. The war in syria nearly five years now, but it has not lost its power to shock. Last fall the images of this drowned 3yearold boy focused International Attention on the syrian refugee crisis and its young victims. Now new if you are sayses emerged from inside syria. They are difficult to watch. Scenes of starvation. Many of the victims are children. Richard engel reports on this latest atrocity. Reporter these are not images from a concentration camp. They are from this week in syria. Mohammed says he hasnt eaten for seven days. He was filmed by a nurse from the village who smuggled out many images and finally got the worlds attention. We spoke to the nurse by phone today. He said hes also hungry and that 40 of his neighbors starved to death since december because the Syrian Government or food in. It was once a summer resort, now its one of more than a dozen villages in syria besieged and starving. Its people forced to eat leaves and grass, but even thats hard to come by in winter. Both sides in this war are using starvation, both guilty of war crimes. Against International Humanitarian law, starvation has been used as a tactic of war. Reporter the hospital is out of medicine. Some children havent eaten for two weeks. You can just look at the pictures. As a doctor, im looking at children with sunken eyes, all the telltale signs of malnutrition. Reporter the Syrian Government is starving maddia because the revels siege twod villages. The u. N. Said today an agreement had been reached to allow some aid into all three, but doctors say it could be too late for some of these children. Richard angel, nbc news, london. Still ahead tonight, we are flying with a chopper crew on alert to the most dangerous kind of rescue, pulling people out of the raging flood waters from el nino. Also, headsup, the infamous bridge in one American City sheering the tops off trucks. Woman its been a journey to get where i am. And i didnt get here alone. There were people who listened along the way. People who gave me options. Kept me on track. And through it all, my retirement never got left behind. So today, im prepared for anything we may want tomorrow to be. Every someday needs a plan. I sure had a lot on my mind when i got out of the hospital after a dvt blood clot. What about my family . My lil buddy . And what if this happened again . I was given warfarin in the hospital but i wondered if this was the right treatment for me. Then my doctor told me about eliquis. Eliquis treats dvt and pe blood clots and reduces the risk of them happening again. Not only does eliquis treat dvt and pe blood clots, but eliquis also had significantly less major bleeding than the standard treatment. Knowing eliquis had both. Turned around my thinking. Dont stop eliquis unless your doctor tells you to. Eliquis can cause serious and in rare cases fatal bleeding. Dont take eliquis if you have an artificial heart valve or abnormal bleeding. If you had a spinal injection while on eliquis numbness, or muscle weakness. While taking eliquis, you may bruise more easily. And it may take longer than usual for bleeding to stop. Seek immediate medical care for sudden signs of bleeding, like unusual bruising. Eliquis may increase your bleeding risk if you take certain medicines. Tell your doctor about all planned medical or dental procedures. Eliquis treats dvt pe blood clots. Plus had less major bleeding. Both made switching to eliquis right for me. Its being described as the godzilla el nino. Its fueling storms in the west coast. Massive waves, 27 to 40 feet high in some areas. A rock slide closed an entrance to yosemite park. High flood level trapped cars. Emergency crews swift water rescues are some of the most dangerous rescue missions. One brave chopper crew ready to be put to the test by the waters of el nino. Reporter high above every calamity, a different kind of in l. A. County, they call this the fire hawk, a military blackhawk with upgrades. Their plane was made to go in harms way and come back. When these are going somewhere, they are going to help man. Reporter marty martin and his teammates ready for their next assignment, a threat not seen here in nearly two decades. Hold on to the ropes reporter the deadly 1997 97 el nino event cost half a billion dollars in once those especially on the front end of the el nino, people are not acclimated to the water. Reporter Los Angeles County has eight helicopters, largely for fighting fires. The most difficult thing they do is this. Swift water rescues. The target is moving, the channel is narrow. But this is a drill. The actual rescue far the thing about these swift water rescues is the water is relentless. Reporter el nino predicted to be Even Stronger than the 97 98 event. A major threat for millions. Another mission for the saviors in the sky. Jacob ras con, nbc news, los angeles. 17 miners trapped hundreds of feet underground and the you do all this research on the perfect car. Gas mileage, horse power, torque ratios. Three spreadsheets later, you finally bring home the one. Then smash it into a tree. Your Insurance Company is all too happy to raise your rates. Maybe you shouldve done a little more research on them. For drivers with accident forgiveness, Liberty Mutual wont raise your rates due to your first accident. See Car Insurance in a whole new light. Liberty mutual insurance. I do my best to manage. But its hard to keep up with it. Your body and your diabetes change over time. Your treatment plan may too. Know your options. Oncedaily toujeo is a longacting insulin from the makers of lantus. It releases slowly to provide consistent insulin levels for a full 24 hours. Toujeo also provides proven full 24hour blood sugar control and significant a1c reduction. Toujeo is a longacting, manmade insulin used to control high blood sugar in adults with diabetes. It contains 3 times as much insulin in 1 milliliter as standard insulin. Dont use toujeo to treat diabetic ketoacidosis, during episodes of low blood sugar, or if youre allergic to insulin. Allergic reaction may occur and may be life threatening. Dont reuse needles or share insulin pens, even if the needle has been changed. The most common side effect is low blood sugar, which can be serious and life threatening. It may cause shaking, sweating, fast heartbeat, and blurred vision. Check your blood sugar levels daily while using toujeo. Injection site reactions may occur. Dont change your dose or type tell your doctor if you take other medicines and about all your medical conditions. Insulins, including toujeo , in combination with tzds thiazolidinediones may cause serious side effects like Heart Failure that can lead to death, even if youve never had Heart Failure before. Dont dilute or mix toujeo with other insulins or solutions as it may not work as intended and you may lose blood sugar control, which could be serious. Ask your doctor about toujeo. My Opioid Pain Medication is slowing my insides to a crawl. Millions of people are estimated to suffer from opioidinduced constipation, oic, caused by the opioids they use to manage chronic pain. Oic is a different type of constipation. Opioids block pain signals, but they can also block activity in the bowel. Im really struggling to find relief. Ready to paint a different picture . Yes talk to your doctor about oic and prescription treatment options. We are back now with a nailbiting drama that played out for 11 hours hundreds of feet below ground. 17 miners trapped in an elevator shaft and a major operation to save them. Rehema ellis takes us to the scene of the rescue in upstate new york. Reporter after ten hours trapped below ground, the ordeal ended as everyone had hoped. 17 workers in an upstate new york salt together in an elevator shaft in freezing temperatures. They did what they could do to keep each other warm and spirits up. Reporter overnight, blankets, water, heating pads and food were lowered to the men and shared with rescue workers in this tightknit community. Everyone knows someone working there. Reporter working in the deepest salt mine in north america, 2,300 feet into the earth. They were stuck in the elevator 900 feet down. More than the height of the world famous 30 rockefeller center. A special crane with a basket was brought in and pulled the miners to safety. Here at the Lansing Fire Department just across the street from the mine, firefighters are specifically trained for just this type of crisis. Everybody went home safe. It was a huge success. Reporter tonight, the nearly 100yearold mine remains closed as investigators try to figure out what caused the accident. Rehema ellis, nbc york. A hollywood passing to note tonight. Pat Harrington Jr died. The actor comedian was best known to playing the part of super Dwayne Schneider on the sitcom one day at a time, becoming a favorite of so many viewers and winning an emmy. Harringtons manager says he passed away in los angeles from complications of alzheimers disease. He was 86 years old. 700 million. Thats how much money is up for grabs. The Powerball Jackpot now the largest in American History after no one matched all the winning numbers last night. If you win the next drawing this weekend and choose the lump sum payout, its estimated youll get 428 million and a pretty awesome saturday night. When we come back, dozens of high trucks versus one low bridge. The bridge wins every time. All caught on tape. Another day, and im still struggling with my diabetes. I do my best to manage. Your body and your diabetes change over time. Your treatment plan may too. Know your options. Oncedaily toujeo is a longacting insulin from the makers of lantus. It releases slowly to provide consistent insulin levels for a full 24 hours. Toujeo also provides proven full 24hour blood sugar control and significant a1c reduction. Toujeo is a longacting, manmade insulin used to control high blood sugar in adults with diabetes. It contains 3 times as much insulin in 1 milliliter as standard insulin. Dont use toujeo to treat diabetic ketoacidosis, during episodes of low blood sugar, or if youre allergic to insulin. Allergic reaction may occur and may be life threatening. Dont reuse needles or share insulin pens, even if the needle has been changed. The most common side effect is low blood sugar, which can be serious and life threatening. It may cause shaking, sweating, fast heartbeat, and blurred vision. Check your blood sugar levels daily while using toujeo. Injection site reactions may occur. Of insulin without talking to your doctor. Tell your doctor if you take other medicines and about all your medical conditions. Insulins, including toujeo, in combination with tzds thiazolidinediones may cause serious side effects like Heart Failure that can lead to death, even if youve never had Heart Failure before. Dont dilute or mix toujeo with other insulins or solutions as it may not work as intended and you may lose blood sugar control, which could be serious. Pay no more than 15 per prescription for 12 months. Eligibility restrictions apply. Learn more at toujeo. Com info or call 8005803421. Also, 9 out of 10 Medicare Part d patients can get toujeo at the lowest branded copay. Ask your doctor about the proven full 24hour blood sugar control of toujeo. This is brad. His day of coaching begins with knee pain, when. Hey brad, wanna trade the all day relief of two aleve for six tylenol . Whats the catch . Theres no catch. No. For my knee pain, nothing beats my aleve. Finally tonight, you know what people say. Its like a car crash where you cant take your eyes off it . We mean it literally. Millions glued to videos of truck after truck slamming into the same small bridge in North Carolina. Now over 100 of them caught on camera, while our team was there why does it keep happening . Thats what nbcs Gabe Gutierrez went to find out. Reporter they call it the can opener. Its insane. Reporter in durham, North Carolina ive seen as many as three in one day. Reporter at gregson and peabody, its perhaps the most unforgiving bridge in america. More than 100 crashes here since 2008. No major injuries, just winsworthy frustration over and over and over again. All captured on webcams. All thanks to this man. I sit at my desk working peacefully. All of a sudden there is this massive crash out there. I almost fall out of my chair. Reporter his videos draw millions of hits on youtubes. Even collects the debris and sells it as crash art. Sure enough, just after we finished hard to believe, but this happened. The driver rattled but okay. I thought i had enough clear. Reporter the bridge was built for trains 75 years ago, the clearance 118, about two feet lower than usual. Locals know that, but many rental druk drivers dont. The states put in lights and signs, but drivers either dont see them or ignore them. Why not raise the bridge . You would be looking at significant costs to lower the road or raise the grade of the railroad. Reporter instead the state is planning to install more sophisticated warning sensors. They hope it might make these crashes a thing of the past. Or better yet, water under the bridge. Gabe gutierrez, nbc news, durham, North Carolina. Its true. You cant look away. Thats going to do it for us on a thursday night. Im lester holt. For all of us here at