If you were a hippie in the 60s, you need to know. Its the dawning of the age of aquarius. Yeah, and Something Else thats cool. What . Osteoporosis is preventable. All osteos preventable . Right on if you dig your bones, protect them. All cbs cares today, Donald Trumps physician said the republican candidate would be, and this is a quote, the healthiest individual ever elected to the presidency. He called trumps Blood Pressure of 110 65 astonishingly excellent, but even that trumpian hyperbole couldnt help with other numbers today that arent so healthy. Seven weeks before the caucuses, trump trails ted cruz in iowa by heres major garrett. Were doing really well. Iowas been amazing. Reporter donald trump is no longer winning in iowa. The Des Moines RegisterBloomberg Politics poll is one of two in the last week to show ted cruz on top. The third poll out today has trump and cruz tied. Faced with adversity, trump is now attacking cruz. I dont think he has the right temperament. I dont think hes got the right judgment. Reporter trump mocked cruzs frequent clashes with gop leaders, most memorably when he triggered the 2013 Government Shutdown in a futile attempt to end obamacare. You look at the way hes dealt with the senate, where he goes in there like, frankly like a little bit of a maniac. Youre never going to get things done that way. Reporter cruz considers the shutdown a demonstration of conservative zeal among gop establishment timidity, but cruz, ever wary of aggravating the point. Instead he posted this throwback video of the movie flashdance, dedicated, cruz said, to maniacs everywhere. Trump and cruzs battle in iowa has come at the expense of former leader ben carson. He told an iowa radio show hes fallen behind as terrorism has become a top campaign issue. Reporter tomorrow nights prime time debate will give carson a chance to turn the tide on foreign policy. Marco rubio, whose november rise in the polls, has suddenly stalled, is also in need of fresh momentum. Scott, rubio is still best positioned as the republican alternative should voters want one, to trump, cruz and carson. Major garrett not in venice major, thanks very much. Today the army said that Bowe Bergdahl will be courtmartialed for desertion and endangering his fellow troops. Bergdahl was a taliban prisoner for five years after he walked away from his post in afghanistan. He was swapped last year for five prisoners at guantanamo. An army hearing officer had recommended no jail time, but bergdahl now, if convicted, could face up to life in prison. It was three years ago today that a gunman opened fire at Sandy Hook Elementary School in newtown, connecticut, killing 20 first graders and six adults. Vice President Biden tweeted, since that nightmare, an estimated 555 children have been killed by guns in america. It is shameful that congress has not acted. As the nation continues to Mental Health care, newtown parents are reminding us of the urgency. And heres michelle miller. We gather here in memory of 20 beautiful children. Reporter when the numbers became names charlotte, daniel. Reporter and the names became faces, suddenly they were americas children. 20 first graders gunned down in their classrooms along with their teachers. Its always 12 14. It is always the last day that they went to school. Thats never going to change. Reporter but something had to change for nicole hockly, who lost her sixyearold son dylan. This is about not accepting this. We cant just passively sit back and say, these shootings happen. Reporter together with other newtown parents, she helped found sandy hook promise, a group working to prevent gun violence. I can still feel him. I can hear his little voice. Reporter mark barden also lost his sixyearold son daniel. In almost every one of these Mass Shootings, there are signs and signals. There are opportunities to intervene to stop that continuum before it leads to tragedy. Reporter together they travel the country teaching others how to respond to those signs. They call it the Say Something campaign. If you see someone at risk, Say Something. That training worked recently in cincinnati when a student reported someone plotting an attack. The whole thing was stopped and diffused. Reporter did the hairs. Oh, yeah. I burst into tears. It was overwhelming. To actually know we potentially saved lives, that means something. Reporter and so does sweeping Gun Legislation they helped pass in connecticut two years ago. It expands the ban on assault weapons and limits the number of rounds per magazine. Setbacks. With the defeat of a bill two years ago that would have closed loopholes in background checks for gun buyers. A lot of people say, if it didnt happen with newtown, when will it happen . It is happening. Sandy hook was the start. It was a catalyst for change. Its too late for us, but theres a lot of other positive change for this country that will come. Reporter change that will keep a promise to the children of sandy hook. Michelle miller, cbs news, new york. We have been bringing you a variety of opinions on how to curb gun violence, from gun rights to gun control. Tonight we continue our series, voices against violence. Im tom farley, the former Health Commissioner for new york city, and now the chief executive officer for an good projects. Let me put the problem of gun violence into perspective. Think of the most horrific Mass Shootings in american history. Newtown, 26 people killed, virginia tech, 32 people killed, and we lose that many people to gun violence every day in america. On an average day in america, 31 people are killed with gun homicides, and 58 people shoot themselves with guns. This isnt just a Law Enforcement problem, its a Public Health problem. Homicides and suicides are the numbertwo and numberthree causes of death in young people and teenagers in america today. Those people arent being killed with viruses. Theyre being killed for the most part by bullets. The gun is, after all a machine, a mechanical object that causes injuries, like a car, and car crash deaths in this country have dropped by more than half since 1980 by a Public Health approach with safer highways and safer car design. We can take a Public Health approach to design safer guns and put in other Public Health policies to reduce gun deaths, as well. Process for background checks. You can undergo a more thorough vetting if you want to adopt a cat from a shelter than to get a gun. If you can reduce the number of guns in america, we can prevent an awful lot of those shootings. Former new york city Health Commissioner tom farley. If a drone is on your shopping list, theres something you need to do before it takes off. The cbs overnight news will be right back. 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Reporter when the faa registration website goes live next monday, current drone owners will have two months to register. Newly purchased devices will have to be registered before taking flight. I think this does add a level of seriousness to the operation of the drone. Reporter former faa assistant administrator scott brenner. Do they need to have a Drone Registration Program . I think the faa was struggling with how do we educate new users, and by creating this registry, now we have a direct link to every user, which will allow us to do a tremendous amount of education. Reporter the faa hopes that education will prevent more close calls in the air. A new report identified 158 incidents in the last two years where a drone came within 200 feet of another aircraft. Evasive maneuvers. There has never been a confirmed collision between a drone and another aircraft. The new Registration System will require drone owners to give their name, Mailing Address and email and pay a 5 fee. I think its going to create a deterrent. I think some will not want to pay that fee. Reporter lawyer Michael Drobac works with the drone industry, which has been supportive of a Registration System. Does having the Registration System make the skies safer, do you think . Do i think those who would act in an inappropriate manner, do i think they will register . Probably not. Reporter the faa will waive that 5 fee for the first 30 days. Scott, all operators will be given an Identification Number that has to be displayed on their drones. Kris van cleave, thanks very much. Still ahead, the bully swiftly and carry a big stick. Today, bill cosby filed suit against seven of the women who have accused him of sexual misconduct. They are suing him claiming he defamed them by trying to brand them as liars. In his countersuit, he says they are trying to assassinate his reputation. More trouble today for americans who make a living in the oil patch. Shell says it will cut 2,800 more jobs. Shells total for the year comes to 10,000 layoffs. Oil closed today at 36 a barrel, down nearly 25 since may. 18 months ago in the summer of 2014, it was 105, nearly three times higher. Stocks closed higher. The dow gained 103 points. On cape cod its not foul weather that stays this courier from the swift completion of his in turkeys. The letter carrier carries a pole to keep the birds at bay. Not clear why they follow him. Perhaps theyre looking for mail companionship. Were not looking for a stamp of approval on that last line. After the diplomatic breakthrough, the sounds of havana are playing in chicago. And that story is next. Having a heart attack . Chest pain, like theres a ton of weight on your chest. Severe shortness of breath. Unexplained nausea. Cold sweats. Theres an unusual tiredness and fatigue. Theres unfamiliar dizziness or lightheadedness. Unusual pain in your back, neck, jaw, one or both arms, even your upper stomach, are signs youre having a heart attack. Dont make excuses. Make the call to 911 immediately. Learn more at womenshealth. Gov heartattack. While i was on a combat patrol in baqubah, iraq, a rocketpropelled grenade took my arm off at the shoulder. I was discharged from the army, and ive been working with warriors, you dont have to be severely wounded to be with the Wounded Warrior project. We do have a lot of guys that have posttraumatic stress disorder. Being able to share your story, i guess it kind of helps you wrap your mind around what did happen over there. My name is norbie, and yes, i do suffer from posttraumatic stress disorder, today president obama said he is very interested in visiting cuba, but not until cubans are given more freedom. It was one year ago this week that the u. S. Began restoring diplomatic ties that were severed half a century ago. And Dean Reynolds tells us that has led to a musical breakthrough. Reporter for this ensemble of young, cuban jazz musicians, better relations with the United States sound like this. American soil at chicagos auditorium theater, 24yearold conductor ernesto lima says there is a message in their music. Well, the improvisation is freedom of the music. Reporter so improvisation is freedom. Yes, i think so. Reporter their concert was a year in the making, and the dream of the chicago jazz philharmonics artistic director orbert davis. We have to think about the people, the musicians, the culture. Music is everybodys and its what they value. If they can trust us with that, theyll trust us with other things. Reporter we first met davis and these students a year ago in havana. 21yearold wendi galvez has been playing violin since she was seven. Billie holiday, ella fitzgerald, those are my gods. The rest of the students study music here, where the residue of jazz left over from america before the castro revolution still echoes through the instruments. Dizzy gillespies 1947 manteca is one of the best examples of the two nations musical collaboration before fidel castro closed jazz halls and took over clubs like the famous tropicana. The u. S. Embargo that followed created another challenge. You dont have the bestquality instruments. No, because we dont produce instruments in cuba. Reporter so this is not a stradivarius . No. [ laughter ] reporter which made their performance on this night all the more remarkable. Do you think music is a universal language . Yes, if you dont know how to speak english, but when you are playing, you understand reporter with music there is no language barrier. Dean reynolds, cbs news, chicago. And thats the overnight news for this tuesday. For some of you, the news continues. For others, check back with us just a little bit later for the morning news and of course, cbs this morning. From the Broadcast Center in new york city, im scott pelley. This is the cbs overnight news. Welcome to the overnight news. Im don dahler. With the holidays right around the corner, president obama is trying to assure americans that their celebrations will be safe. One week afer his Oval Office Address on terrorism, the president made the rounds of his security agencies. At the pentagon, mr. Obama insisted u. S. Intelligence has uncovered no credible threat of an attack over the next few weeks, and he said the u. S. Military is taking the fight to the Islamic State in both iraq this fall, even before the revolting attacks in paris and san bernardino, i ordered new actions to intensify our war against isil. These actions, including more firepower and special Operations Forces are well under way. This continues to be a difficult fight. As i said before, isil is dug in, including in urban areas and hide behind civilians, using defenseless men, women, and children as human shields. Even as were relentless, we have to be smart, targeting isil surgically, with precision. At the same time, our partners on the ground are rooting isil out town by town, neighborhood by neighborhood, block by block. That is what this campaign is doing. We are hitting isil harder than ever. Coalition aircraft, our fighters, bombers, and drones have been increasing the pace of their strikes. Nearly 9,000 as of today. Last month in november, we targets than any other month since this campaign started. Were also taking out isil leaders, demanders, and killers one by one. Going after them from their strongholds in downtown raqqah to libya, where we took out the isil leader there. The point is, isil leaders cannot hide, and our next message to them is simple you are next. Every day, we destroy as well more of isils forces, their fighting positions, bunkers, staging areas, heavy weapons, bomb making factories, compounds and training camps. Many places isil has lost its freedom of maneuver, because they know if they mass their forces, we will wipe them out. In fact, since this summer, isil has not had a single successful major offensive operation on the ground in either syria or iraq. In recent weeks, weve unleashed a new wave of strikes on their lifeline, their oil hundreds of their tanker trucks, wells, and refineries. And were going to keep on hammering those. Isil also continues to lose territory in iraq. Isil had already lost across kircut province and tikrit. More recently, isil lost at sinjar and baiji, where its oil refinery. We saw a daring raid supported by our special forces which rescued dozens of prisoners from isil, which Master SergeantJoshua Wheeler made the ultimate sacrifice. So far isil has lost about 40 of the Populated Areas it once controlled in iraq. And it will lose more. Iraqi forces are now fighting their way deeper into ramadi. Theyre working to encircle fallujah and cut off supply routes into mosul. Our partners on the ground face a tough tight ahead, and were going to continue to back them up with the support they need to ultimately clear isil from iraq. The president s strategy is playing out on the front lines in northern iraq. Although isis still controls vast territory, their offensive to overrun the kurds has been stopped in its tracks outside mosul. Charlie dagata took a news crew there. Reporte