Entire School System in response to a Terror Threat that turned out to be a hoax. The threat came less than two weeks after the attack in San Bernardino less than 60 miles away. Critics of l. A. Include the citys former police chief, who now heads the new York City Police department and had a very different response to a similar threat today. Heres jeff pegues. Reporter the email to members of the Los Angeles School board was long and rambling. It was sent last night and threatened an attack with assault rifles on every school with bombs hidden in backpacks in lockers. The writer claimed he was part of a cell of 32 comrades willing to die, and there is nothing you can do to stop it. New york city received a similar email threat, but unlike los angeles, kept its schools open. Police commissioner bill bratton said the threat was a hoax. The language in the email would lead us to believe that this is not a jihadist initiative, for example, that allah was not spelled with a capital a. That would be incredible to think that any jihadist would not spell allah with a capital a. It is not something that we are concerned with. What we would be concerned with is overreacting to it. Reporter Los Angeles Police chief charlie beck defended l. A. s decision to close the schools. I think its irresponsible, based on facts that have yet to be determined, to criticize that decision at this point. All of us make tough choices. All of us have the same goal in mind we want to keep our kids safe. Rep ince the attacks in paris and San Bernardino, police are on edge and intelligence Officials Say it is harder than ever to separate a credible threat from a hoax, especially with online propaganda from a variety of terror groups. Experts say isis in particular sends anywhere from 60,000 to 100,000 tweets a day. Mike morrell is a former Deputy Director of the c. I. A. Is a cbs news consultant. So in the age of isis, does getting specific or credible threat information mean what it used to mean . I think its probably a little harder because there are so many more voices out there. Reporter social media. Social media, right. Theres isis itself, and then theres isis supporters and youve got people saying Different Things and youve got people making different threats. So i think its probably a little harder today to sort fact from fiction. Reporter investigators are still looking for the person who sent those emails. They were routed through a server in germany, and tonight the servers owner says he is cooperating with Law Enforcement. But, scott, he would not tell us if he knew where the emails originated. Pelley jeff pegues, thank you. Well, wherever they originated, they shut down more than 1,000 schools in l. A. , a School District second in population only to new york and covering 710 square miles. Heres ben tracy. Reporter the robocall alert from the nations secondlargest School District went out at 6 32 a. M. , idling hundreds of school buses and stopping parents and more than 640,000 students in their tracks. Nicole scates son, donovan, is in second grade. Kind of scared but, you know, my immediate thought was just how i was going to talk to him about it. Reporter 11yearold sullivanne montagu heard the news from her dad. He told me that it was a threat, possibly a bomb, and i got kind of nervous. Reporter los angeles unified School District superintendent Ramon Cortines said he was comfortable with his decision. Somebody has sent information that leads us to pause and make sure that we are safe, that our children and our staff are safe. Reporter hundreds of Law Enforcement officers were deployed to campuses. Police secured buildings, Armored Vehicles were mobilized, and every school in the district would be searched. Given the terrorist attack less than two weeks ago in nearby San Bernardino, Los Angeles MayorEric Garcetti defended the decision to quickly close l. A. s schools. Weve just gone through a horrible experience of losing loved ones, of seeing that sort of horror right here in our backyard, and i think just as new york did after 9 11, boston after the marathon, theres an abundance caution that may be very regionally specific. Reporter 95 of l. A. s Public Schools have now been searched and nothing suspicious has been found. Scott, we are told that some parents are already receiving e mails that their kids schools will be open tomorrow morning. Pelley ben tracy in l. A. For us, thank you. Terror is sure to be a topic at the republican president ial candidate debate tonight, the fifth, this one in las vegas. Frontrunner donald trump is again at center stage, and Major Garrett is there. Reporter donald trump arrived in las vegas on a roll nationally, but trailing senator ted cruz in iowa. The two candidates are sharing center stage at the debate. At a rally here last night, trump ignored the iowa polls. So far, everyone thats attacked me has gone right down the tubes, so thats good. Reporter cruz told a las vegas radio show he will not turn on trump. Reporter but with voters more focused on terrorism, cruz will make the case trump isnt prepared to be commander in chief. So will new jersey governor chris christie, who was tapped to be u. S. Attorney the day before the 9 11 attacks. You need to have the experience of actually having made these decisions. Ive actually done it. This is not something where you get briefed in the basement of the capitol and you understand it. Reporter christi is surging in new hampshire, the contest right after iowa, and sees National Security as an issue he can use against the field. Were we at greater risk then or are we at greater risk now . Were at greater risk now because of the enemy. Al qaeda wanted to do big, monumental, symbolic type of attacks. Isis just wants to kill americans, and so if a center for the developmentally disabled in San Bernardino, california, is a target for terrorism, then every place in america is a target for terrorism. Reporter ben carson has, for the first time, taken the advice of campaign operatives, studied up, and will tonight present a comprehensive plan to defeat isis. Scott, a top carson aid told us the change came about because, sagging poll numbers tend to concentrate the mind. Pelley Major Garrett in vegas, not venice tonight, major, thank you. Hillary clintons mind was concentrated on terrorism today as well. She laid out her strategy for fighting isis and protecting the homeland. Nancy cordes has that. And we will defeat these new enemies. Reporter clinton argued the u. S. Should start scrutinizing the social media postings of visa applicants. Anyone who has traveled in the past five years to a country facing Serious Problems with terrorism and foreign fighters should have to go through a full visa investigation, no matter where theyre from. Reporter clinton unveiled her proposals in minneapolis because its home to the nations largest somali community, a top target for isis recruiters. A quarter of americans who have tried to join isis came from minnesota. I dont think this reflects our community. Reporter city councilman abdi warsame is part of a new local task force thats trying to counter extremist propaganda. How hard is it to pinpoint who is being radicalized . They are usually young. They were either born here or grew up here or came as toddlers. Theyre unemployed. Reporter today, clinton called out republicans like donald trump and ted cruz who shed accused of shallow sloganeering. Promising to carpet bomb until the desert glows doesnt make you sound strong. It makes you sound like youre in over your head. Reporter but republicans contend that the former secretary of state didnt do enough to prevent the rise of isis. She talks about me being dangerous. Shes killed hundreds of thousands of people with her stupidity. Reporter the Clinton Campaign told us that comment didnt deserve a response, and tonight clinton said the country cant give in to demagoguery, a clear reference, scott, to trump and his proposal to ban muslims from the u. S. Pelley nancy cordes on the campaign trail. Nancy, thank you. Well, the president s been telling us not to let fear control our lives. Our dr. Jon lapook talked to an ffpert on the Health Effects of fear. Clinical psychologist dr. Justin sinclair. One of the things that i think is different about this, you know, this threat is, again, its ongoing. People sort of cant know when and where or how its going to happen. Its this thing that never ends, and it is ubiquitous. Its everywhere. Reporter how does that affect their lives . They tend to avoid different aspects of their lives. They fly less, they ride on Public Transportation less. They go into public settings less. Theres been research that has shown they have a tendency to engage people from different cultural backgrounds less. They even consume media less, ironically. Reporter what have you learned over the last 10 years of studying this that might surprise people. How potent fear can be in terms of altering peoples lives and the impact it can have in different aspects of life, whether its making decisions about a president , whether its supporting different policies that are important socially, or even down to sort of, you know, how people live their everyday lives. Reporter is there a danger to society if people incrementally change their behavior over time because of terrorism . Yeah, i think it sort of changes the structure of our country. It changes the structure of our government. I think, you know, fear can maybe even change things in ways that, you know, werent consistent with how the country was founded originally. Reporter as a psychologist, is there some insight into that . I think fear moves people to become much more polarized in their viewpoints, and i think that fear motivates people to, you know, go to further lengths to feel safe. Reporter in small doses, fear can be a lifesaver, prompting us to react to danger. But in large doses it can hurt us, causing fatigue, depression, even heart attack and stroke. Dr. Sinclair says its important to continue normal routine if possible. If fear starts taking over and you find yourself anxious and avoiding things he says it may be time to get professional help. Pelley fascinating interview. Dr. Jon lapook, thanks very much. Well, a plumber in texas has certainly been anxious to tell anyone who will listen that he is not selling vehicles to isis. Anna werner has his story. It was just such a shock when it happened. I you know, i didnt know what to say. Reporter when houstonarea Plumbing Company owner Mark Oberholtzer sold his truck to a local dealer in october of 2013, he had no idea it would wind up on syrias front lines being used by islamist fighters with his Plumbing Company name and phone number still on the side. You know, it hurts my feelings that anyone could possibly think that we were connected to terrorism in any way. Reporter he says he was assured by the dealership that it would remove his information before selling the truck, but there it was in the photo, which then went viral. That country is going down the toilet but for the first time, they know who to call to unclog it. Reporter it was featured on the last episode of the colbert report seen by millions of people earlier this year. Since then, oberholtzer said hes had threats and thousands of phone calls like this one. Reporter heres how the truck left the country. Oberholtzer sold the truck to an autonation dealership in houston, which sent it to an auction near dallas. Then a used car dealer maz auto bought the truck the manager confirms with the lettering still on it and advertised it for sale on their web site. Manager Mohamed Alkhawam said someone called from an International Phone number to buy it for use in turkey. Reporter its not known exactly how the truck then made its the way from mersin, turkey to syria. Used to have mark 1 plumbing would come up on the internet. Now it comes up mark 1 plumbing inc. Isis. Reporter he is now suing the autonation dealership that sold the truck. They did not respond to requests for comments but an executive told our cbs affiliate in houston they thought the Auction Company was removing the decals. Scott, the auction house couldnt confirm for us that they sold the truck. Pelley anna werner, thank you very much. On the second day of deliberations, jurors said they are deadlocked in the trial of a baltimore cop charged in manslaughter in the death of freddie gray. The judge ordered them to keep deliberating. Gray was fatally injured in a police van. Officer William Porter had not buckled him in or called for medical help. Parts of baltimore were burned and looted last spring as anger boiled over. Why has no snow fallen in one of americas snowiest cities . And prices soar as a prime ministers collection goes up for auction when the cbs evening news continues. For adults with an advanced lung cancer called squamous nonsmall cell, previously treated with platinumbased chemotherapy, its not every day something this big comes along. A chance to live longer with. Opdivo, nivolumab. Opdivo is the first and only immunotherapy fda approved based on a Clinical Trial demonstrating longer life. For these patients. In fact, opdivo significantly increased the chance of living longer versus chemotherapy. Opdivo is different. It works with your immune system. Opdivo can cause your immune system to attack normal organs and tissues in your body and affect how they work. This may happen any time during or after treatment has ended, and may become serious and lead to death. See your doctor right away if you experience new or worsening cough; chest pain; shortness of breath; diarrhea; severe stomach pain or tenderness; severe nausea or vomiting; loss of appetite;. Swollen ankles; extreme fatigue; constipation; rash; or muscle or joint pain, as this may keep these problems from becoming more serious. These are not all the possible side effects of opdivo. Tell your doctor about all your medical conditions including immune system problems or if youve had an organ transplant, or lung, breathing or liver problems. A chance to live longer. Ask your doctor if opdivo is right for you. Bristolmyers squibb thanks the patients and physicians who participated in the opdivo Clinical Trial. Advil pain relievers are used by more households than any other leading brand. To treat their aches and pains more people reach for advil. Relief doesnt get any better than this. Advil. Pelle pelley folks in denver got a surprise this morning eight inches of snow, which made driving nearly impossible. But in the east, the seasons are all out of whack. Aprils Cherry Blossoms are blooming now in d. C. After a week in the 60s and 70s. And youd barely recognize buffalo. Jericka duncan is there. Reporter the last time we visited Janice Anzalone we were sitting on her snowcovered roof. This is backbreaking work. Definitely. Reporter want to go back up there . No, i dont ever want to go back on the roof ever again. Reporter in november of 2014, two major snowstorms dumped more than seven feet of snow in buffalos suburbs in 48 hours. Public works commissioner Steve Stepniak says the city had blown through its 6 million snow removal budget. Do you miss it a little bit . I mean, it keeps you guys in business. Yeah, theres something in me that does miss it a little bit, but its there. Its going to be here eventually. Reporter but tis the season to break records. This is the latest buffalo has gone without snow since 1899. And you can thank el nino. Its a phenomenon that has warmed ocean water in the pacific that in turn has led to a strong flow of mild air blowing in from the west. At the same time, a polar jet stream is keeping the cold air bottled up and away from the northeast. Meteorologist eric fisher and last year we had a fairly weak polar vortex which allowed big dips and big ridges allowing the cold air to move southward. This year its spinning very tightly around the arctic, and thats where its expected to stay. Reporter these systems have created extreme weather conditions on both coasts. The west is suffering through storms and flooding. In the buffalo area, the only real signs of winter are christmas decorations. Lakeeffect snow could hit buffalo on friday, and, scott, the National Weather service is iying next week temperatures could be in the 50s, possibly near 60, on christmas eve. Pelley Jericka Duncan in balmy buffalo. Jericka, thanks very much. Well show you a rare view of a rendezvous in space when we come back. Fortunately, many have found a different kind of medicine that lowers blood sugar. Imagine what it would be like to love your numbers. Discover oncedaily invokana®. Its the 1 prescribed in the newest class of medicines that work with the kidneys to lower a1c. Invokana® is used along with diet and exercise to significantly lower blood sugar in adults with type 2 diabetes. Its a oncedaily pill that works around the clock. Heres how the kidneys allow sugar to be absorbed back into the body. Invokana® reduces the amount of sugar allowed back in and sends some sugar out through the process of urination. And while its not for weight loss, it may help you lose weight. 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How can you help . By giving a little more, to yourself. I am running for my future. People sometimes forget to help themselves. The cause is retirement, and today thousands of people came to race for retirement and pledge to save an additional one percent of their income. If we all do that we can all win. Prudential bring your challenges® to prove to you that aleve is the better choice for her this is claira. Shes agreed to give it up. Thats today . Well be with her all day to see how it goes. After the deliveries, i was ok. Now the ciabatta is done and the pain is starting again. More pills . Seriously . Seriously. All these stops to take more pills can be a pain. Can i get my aleve back . For my pain, i want my aleve. Check your sunday paper for extra savings on aleve. Pelley three space travelers took off from kazakhstan today in a soyuz spacecraft. A camera on the International Space station gave us a rare view of their climb into space where they joined three others already on board. The newcomers include tim kopra, the american, and the first british astronaut on the station, tim peake. Back on earth, britains iron lady has become a gold mine for her family and christies auction house. Hundreds of margaret thatchers personal items, including handbags, went up for bid today. Her blue velvet Wedding Dress sold for 38,000, and this red box that carried official papers went for 365. But that model of a bald eagle, a gift from president reagan, took in 400,000. If you think thatcher was tough, wait until you meet grandma keeping order on the streets of milwaukee. When heartburn hits fight back fast tums smoothies starts dissolving the instant it touches your tongue and neutralizes stomach acid at the source tum, tum, tum, tum smoothies only from tums when a moment spontaneously turns romantic, why pause to take a pill . 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Do not take orencia with another biologic medicine for ra due to an increased risk of serious infection. Serious side effects can occur including fatal infections. Cases of lymphoma and lung cancer have been reported. Tell your doctor if youre prone to or have any infection like an open sore, the flu, or a history of copd, a chronic lung disease. Orencia may worsen your copd. If youre not getting the relief you need. Ask your doctor about orencia. Orencia. See your ra in a different way. Money . What we caught execus doing. Next pelley today, the Justice Department said it has agreed to help reform the milwaukee Police Department to improve relations between cops and the community. We end tonight with a retired officer who is reforming her own Little Corner of that city. Heres don dahler. How you doing . How you doing young lady . Reporter her name is martha freeman, but on the tough streets of milwaukee, everyone calls her mama. Thank you, mama. Okay honey, youre welcome. Reporter by night, this 77 yearold mother of five looks for trouble. Hey, yall, get off that corner. Reporter and stops it. The former corrections officer wields only two weapons kindness . Why werent you at church yesterday . Reporter and grit. Is that your car . Reporter has any of them ever hurt you when you confronted them . No. Reporter you can handle yourself . Yeah. I dont see them as bad people. I see them needing help. I think its respect. I try to respect them, also. Ill give you an example. Most of our young people nowadays walk around with their pants halfway down. You all right . Were all right. What i usually do is say, hey, i look like the color of those underwear, and theyll pull their pants up. Reporter by day, she delivers donated bread. Thank you, bye reporter youve kind of adopted the people in this neighborhood. I think so. Either that or they have adopted me. Hey reporter behind the bluster, she says, are young people who crave guidance. Father god in the name of jesus. Reporter April Bentley says she used to be a prostitute until she met mama freeman. She said to me, you dont have to live that life. She planted a seed that no one actually had planted before. I love you. Reporter a seed of hope, and the realization that no matter how bad things are, theres always someone, even on the tough streets of milwaukee why you all waiting over here . You all scared . Reporter . Who cares. Don dahler, cbs news, milwaukee. Pelley and thats the cbs evening news for tonight. For all of us at cbs news all around the world, good night. Captioning sponsored by cbs ca by Media Access Group at wgbh access. Wgbh. Org your realtime captioner is linda marie macdonald. Only on 5, bay area residents paying more for water. While water executives take trips like this one. Tonight, we follow the money. El nino may help but make no mistake. California is still in its fourth year of drought. We have all been forced to cut back and pay more for water but what about the agencies providing it . Are they cutting back too . Only on 5 we sent our betty yu to find out. Reporter its a private Golf Tournament for the movers and shakers of californias water industry. Looks like a vacation but its a business trip. And its not the only one. Kpix 5 analyzed two years worth of expense reports for Board Members and general managers of five bay area water districts. Ratepayers are paying for dozens of expensive out of town conferences, some to places as far away as ireland and norway. One of the most popular annual conferences is taking place this year here in the Coachella Valley home to the most water guzzling communities in california. The desert resort towns of palm springs and palm desert. The association of California Water agencies organized the event held that the renaissance and hayat hotels and spa. I cant help but notice this conference is being held in a place that has the highest water consumption in the state. We do move it around the state. Its important for us to share information and stories from around the state . Reporter among the attendees a familiar face. Hi, im betty yu. Im from channel 5. Nice to meet you