President trump called this a dangerous world in a News Conference today with the visiting canadian Prime Minister. Mr. Trump was asked whether Syrian Refugees pose a terrorist threat, but his answer centered on the recent arrests of illegal immigrants, who have committed crimes. Were actually taking people that are criminals, very, very hardened criminals in some cases with a tremendous track record of abuse and problems, and were getting them out. And thats what i said i would do. Im just doing what i said i would do when we won by a very, very large Electoral College vote. Well, you never hear of refugees from the United States, but Canadian Border officials are po theyre refugees from the middle east who were legally admitted into the United States, but now they worry their legal status could be revoked. Canada has a more welcoming refugee policy. This syrian family youre seeing now crossed on saturday through the woods into quebec. The Canadian Border agency says there were 369 such refugees from the United States in november, and in december there were 591. President trump said recently that no one knows whether Climate Change is real, but hes keeping an open mind. Well, Mark Phillips has something to consider from the bottom of the world. Hes in antarctica for our climate diaries. Reporter high summer in antarctica. An explosion of life when the deep freezer warms up to become explosion of Scientific Research when the antarctic reveals the secrets that have been locked in its ice. Theres something going on. Theres something obviously going on. Its very clear. Reporter ken taylor runs one of the continents most ambitious ice research projects. Whats going on is the huge crack thats opened up in one of the floating ice shelves that cling to the coast here. Theres a large berg. Its about to break off. Reporter you say large berg. Its the size of delaware. And the fraction is breaking off, it jumps about a mile every week or so. Reporter its not the ice from the ice shelf thats worrying. More Antarctic Ice flowing into the sea would increase the threat to lowlying coastal areas around the world, including in the United States. There are several spots around antarctica that are believed to be in this situation wh going to flow into the sea and theres nothing we can do to stop it at this point. Reporter eric gouth is part of a Scientific Study that is proving Antarctic Ice is on the move. This here is the object of your affection . Absolutely. Reporter hes part of the extreme ice survey that uses timelapse photography to document whats happening. Images snapped every hour and then strung together show how quickly the glaciers are flowing. These pictures arent just useful for science, they have another purpose. Much of the general public are visual learners, as am i. I think being able to see that with your own eyes is a very compelling way of communicating information. Reporter arguments over the causes of Climate Change may be raging again at home. Here suggestions of a hoax come up against some cold, hard facts. Ken taylor, the ice scientist, normally drills miles deep into the icecap for answers. Sometimes, though, theyre floating all around you. Bubbles trapped in the ice contain the air that was around tens of thousands of years ago when the ice froze. And that air contained a fraction of the warming greenhouse gasses the human race is now pumping into the atmosphere. You smell that air, youre smelling ancient air. Its really good air. Its like air before humans messed up the atmosphere. Yeah. Smells like ice. Reporter and there is another kind of chill down here, scott, a chill in the Scientific Community, a fear that the funding it needs will be harder to come by in the future and that theres a less sympathetic ear in government for the kinds of science they do. Mark phillips for our climate diaries down under. Thanks. Still ahead, drivers of Ford Explorers say exhaust fumes are making them sick. New guidelines for treating back pain. And later, a panda takes her final baos. alarms wheres the car . Itll be here in three. Uh, four minutes. Are you kidding me . No, looks like he took a wrong turn. Dont worry, this guys got like a fourstar rating, were good. His name is randy. Thats like one of the most trustworthy names ordering a getaway car with an app . Are you randy . Thats me awesome surprising. Whats not surprising . How much money erin saved by switching to geico. Everybody comfortable with the air temp . I could go a little cooler. Ok. Fifteen minutes could save you fifteen percent or more. Ok, it says you apply the blue okone to me. Y this. Here . No. Ah ok, here . Maybe you should read the directions. Have a little fun together, or a lot. Ky yours and mine. Two sensations that work together, so you can play together. Ky yours and mine. Federal safety investigators are looking into reports that exhaust fus latemodel Ford Explorers. Heres our transportation correspondent kris van cleave. Reporter dash camera video shows the moment Newport BeachPolice OfficerBrian Mcdowell passed out behind the wheel of his 2014 Ford ExplorerPolice Cruiser and crashed into a tree. You narrowly missed an suv. Yeah. Reporter this is a matter of inches. I just think plus or minus one second i maybe wouldnt be here on this earth for my kids. Reporter mcdowell is recovering from multiple injuries but has no memory of the accident. I just went out. Just like that. Just like that. Reporter records show he had no drugs or alcohol in his system. Doctors couldnt figure out why he blacked out. I had that nauseous feeling and i felt like i had a headache. Reporter mcdowell then learned hundreds of drivers had been complaining about exhaust that contains Carbon Monoxide leaking into the cabin of the explorers typically when the air this july the nhtsa launched an investigation, citing 154 customer complaints about exhaust in 2011 through 2015 Ford Explorers, but cbs news discovered thats grown to more than 450 complaints, some involving newer models. Nhtsa says there havent been any serious injuries. I was hospitalized several times with uncontrollable headaches, nausea, vomiting. Reporter but stacy jones, who has an autoimmune disorder, believes her suv made her sick. After i started driving the 2014 explorer, my health started to decline rapidly. Reporter ford has known about the problem since 2012 when it issued the first of three repair bulletins to dealers. In a 2015 deposition, a Company Representative acknowledged it appears to be a design issue that remains unresolved. Repairs did not fix the problem for jones, so she traded her the dealers were like, the 17s are fine, no worries. Reporter but she still smelled exhaust, even after weeks of repairs. Its frustrating, because at this point i dont know what im going to do. Reporter officer mcdowell is now suing ford. The automaker tells cbs news in rare circumstances there have been instances where customers detected an exhaust odor in explorers. The statement maintains it poses no safety risk. Kris van cleave investigating for us tonight. Thank you, kris. Still ahead, new advice for back pain. Introducing a deodorant saving millions of clothes. Neeedegr ultraclear black white. W no yellow stains on white clothes. No white marks on black clothes. New degree ultraclear black white. It wont let you down. New pantene doesnt just wash i wiyour hair, it fuels it. Gain. Making every strand stronger. So tangles dont stand a chance. Because strong is beautiful. [joy bauer] two thirds of americans have digestive issues. Im joy bauer, and as a nutritionist i know probiotics can often help. But many probiotics do not survive your stomachs harsh environment. Digestive advantage is different. Its natural protein shell is tougher than your stomachs harsh environment, so it surivies a hundred times better than the leading probiotic, to get where you need it most. Get the digestive advantage, and enjoy living well. An adopted son of the notorious child molester Jerry Sandusky was arrested in pennsylvania today. 41yearold Jeffrey Sandusky faces 14 counts of child sexual abuse. He has been suspended from his job as a prison guard. Sanduskys lawyer declined to comment. His father, the former assistant football coach at penn state, is serving at least 30 years for abusing ten boys. If you have an achy back, you have got company. As many as 80 of adults will have back pain. And tonight our doctor john lapook runs us through new guidelines from the American College of physicians. Reporter 76yearold Berta Axelrad has lived with chronic the pain is just so well, its terrible. Reorter she swears by exercise, yoga and walking. It minimizes the pain. Its not always easy, but its much better than doing nothing. Reporter todays guidelines say the first line of therapy should be nondrug treatment for pain lasting less than three months, those include heat wrap, massage, acupuncture and spinal manipulation. The authors stress that clinicians should avoid costly and potential harmful treatments like narcotics. For pain lasting more than three months, treatments include stretching and strengthening exercises, tai chi, yoga, acupuncture and mindfulness techniques like meditation to relieve stress. If those fail, antiinflammatories such as ibuprofen should be considered first, then medications that can dull nerve pain like tramadol or duloxetine. Some of these treatments such as yoga or massage are often offerets Traditional Health care system. Reporter dr. Steven atlas of Massachusetts General Hospital wrote an editorial about the guidelines. Some of these may be a shot across the bow to insurers to say, maybe we should be covering them better. And rotate once to your left. Reporter physical therapist dana rose demonstrated some moves designed to bring relief. By activating and using your core muscles, that should lessen the load through our joints to help minimize back pain. Reporter the recommendation to use nondrug therapies first is especially relevant when the country is facing an epidemic of opioid abuse. Jon lapook, thanks, doc. Coming up next, a big loss for cub fans. The national zoo tweets word that the giant panda may shong gave birth this afternoon to her third b, a female. The birth of bao bao three and a half years ago. Next week chip reid tells us shell be going to china, for good. Reporter from the day she was born millions of bao baos grow up on the panda cam. They saw her first checkup. And her first birthday. They watched her fall in love with bamboo, her First Encounter with a camera, her first tumble in the snow, her first game of hide and seek, or maybe pretending to be a turtle. And they watched her learn that when mom says, get down, she means get down now. On every step of the way, trainer marty dearie was there. Now hes preparing her for another first. Hi, lady. Come on, bao. Good girl. Reporter hes getting her used to the crate that will take her to her new home in china next week. By giving her honey water, it continues to build this space as somewhere she wants to be. Reporter dearie will be traveling with her. Im someone she knows really well. Reporter you hold her hand . Yeah exactly. When china lent bao baos mother to the zoo was any cubs would be sent to china to breed before they turned four. Brandy smith is the zoos associate director for animal care sciences. I think its like your kids going off to college. Its hard thing to do. Were a little bit sad. Were a lot worried. But in the end we know its the right thing to do and its the best thing for her. Reporter you think there are going to be tears . Yeah. Im a crier. I can admit that. Reporter tears but also the satisfaction of knowing that bao bao will be doing her part to save this vulnerable and adorable species. Chip reid, cbs news, washington. And thats the overnight news for this tuesday. For some of you the news continues. For others, check back with us a little bit later for the morning news and dont miss cbs this morning. From the Broadcast Center in new york city, im scott pelley. [000 22 55;00] ca ptions by vitac www. Vitac. Com this is the cbs overnight news. Hi, everyone. Welcome to the overnight news. Im demarco morgan. Evacuation remains in effect. Weeks of torrential rain has the oroville dam in california filled to the brim. Two emergency spillways used to handle the overflow are crumbling. With more rain in the forecast, nearly 200,000 people have been forced from their homes. John blackstone has the story. Reporter with water thundering out of oroville dam, officials are in a race to lower the lake level, which is at near capacity. California department of Water Resources director bill croyle. Were move 1g00,000 cubic spillway. Weve been doing that for about 16, 17 hours. Reporter as the water pours out, crews are preparing to move huge boulders to fortify the dams spillways. The main concrete spillway that funnels excess water into a floodplain began breaking apart last week. Chunks of concrete gave way, and the hole kept getting bigger. Engineers decided to use an emergency spillway that had never been needed in the dams 48year history. It worked, for a while, but the emergency spillway couldnt handle the excess flow. A wide gash on sunday raised fears the structure could give way, possibly inundating several communities below with a 30foot wall of water. Nearly 200,000 were told to leave immediately, creating grid lock. Resident ed hershey. Miserable. Bumper to bumper. It was chaos. Everybody was just trying to rush to get out. Reporter now residents are waiting for the all clear, which tt this is a dynamic situation. Its a situation were still trying to assess. We need to have time before we allow people back into those areas it is safe to do so. Flynn denied discussing u. S. Sanctions with the russian. But u. S. Intelligence officials tell a different story. And now, flynn is apologizing. Major garrett has the story. North korea is a big, big problem. And we will deal with that very strongly. Reporter as President Trump and canadian Prime MinisterJustin Trudeau held a News Conference, National Security adviser Michael Flynn joined other senior white house officials in the front row. Mr. Trump ignored shouted questions about his confidence in flynn as he left the east room. Counselor to the president Kellyanne Conway. Yes, general flynn does enjoy the full confidence of the president , and this is a big week for general flynn. Hes the point of contact for many of these foreign visits. Reporter just over an hour later, though, the white house said the president is evaluating the situation. The fbi and other intelligence agencies are investigating conversations flynn had with the Russian Ambassador to the u. S. Before President Trumps inauguration. Flynn initially denied discussing u. S. Sanctions on russia during the calls, a potential violation of federal law, but last week flynn said he couldnt be sure if the topic came up. In january Vice President elect pence defended flynn on face the nation. Those conversations that happened to occur around the time that the United States took action to expel diplomats had nothing whatsoever to do with those sanctions. Reporter the white house now says President Trump is speaking to Vice President pence relative to the conversation the Vice President had with general multiple sources tell cbs flynn called pence to apologize this weekend. White house policy adviser Steven Miller was asked yesterday if deceiving the Vice President was a fireable offense. Its not for me to answer hypotheticals. It wouldnt be responsible. Its a sensitive matter. In ant ashl ark ka, Mark Phillips is there traveling with scientists from National Geographic explorer. Reporter this is what summer looks like in anarctica. An explosion of life when the reveals the secrets that have been locked into its ice. Ken taylor is one of americas foremost ice scientists. And what hes talking about is the huge crack thats opened up in one of the floating ice shelves that cling to the coast of antarctica. Theres a large berg its the size of delaware. And the fraction breaking off, it jumps about a mile every week or so. Reporter its not the ice from the ice shelf thats worrying. Without the ice shelf to hold it back, the glacial ice on land will flow into the oceans more quickly and drive sea levels up even more than the three feet that is already predicted for the century. There are several spots around antarctica that are believed to be in this situation where the ice on the ground is going to flow into the sea and theres nothing we can do to stop it at this point. Reporter eric gouth is trying to get at sce way. There are concerns about ice shelf stability, there are concerns about warmer sea temperatures around the an