Wild blue yonder. The news today that reminded americans and people all over the world what it feels like to dream and explore and what can happen when science and brain power and engineering combine to take us places far away. After traveling through space for ten years and doing five laps around the sun, a small spacecraft has landed on a comet and both are now hurtling through space at 40,000 miles an hour, traveling somewhere between mars and jupiter. Think of it this way, tonight as we come on the air there are american footprints on the moon, a rover driving across the surface of mars, now a spacecraft the size of a washing machine hanging onto a comet for dear life. We begin tonight with nbcs katy tur at the European SpaceAgency Headquarters in germany. Reporter these are pictures from 300 million miles away of something weve never seen this close before, the surface of a comet. The Mission Began a decade ago, today success. From Mission Control in germany to viewing parties across america scientists and space watchers were overjoyed. I feel being part of a history proud. Reporter and in some cases overwhelmed. Rosetta chased comet for 4 billion miles just recently getting close enough to take a landing site and even a selfie. But touching down was anything but easy. Essentially its like dropping a penny into the mouth of an open bottle from a really great height. Except this was infinitely more complex. The comet is relatively small, wider than the island of manhattan, it has a rof surface covered in cliffs and craters, low gravity and is constantly spinning. And i think it was bold. It took a certain amount of ambition, shall we say, to even attempt to do this. Reporter despite the initial good news, continue confusion about whether the washing machine size lander managed to stay put on the comets icy surface. Still, scientists did collect some data, and that could help solve one of lifes biggest mysteries. How did we get here . A comet was formed before earth was. And it brings an enormous amount of water with it. Now, we are a water planet. Where did our water come from . And one of the ideas is indeed a lot of the water came from outer space through comets and meteorites. Reporter mankind has marvelled at comets for centuries. They are the stuff of legend. Today they became a destination. And we all got to go along for the ride. Katy tur, nbc news, germany. Back down here, those concerned about Climate Change are calling this the breakthrough theyve been waiting for, a deal brokered between the u. S. And china to greatly reduce Carbon Emissions. Though critics are already questioning whether china got the better end of this deal. We get our report tonight from our chief Environmental Affairs correspondent anne thompson. Reporter chinas pollution problem is plain to see. Forcing marathoners to wear masks. Even the police. The government tried to clear the smog for this weeks World Leaders meeting by closing factories and banning cars as it did for the 2008 olympics. Both had limited success. The air itself is just plain thick. The worst its been here in days. Reporter now after years of dragging its feet, china is pledging to reduce pollution by taking action on Climate Change with the u. S. The u. S. And chinas worlds biggest economies are also the worlds biggest carbon emitters. We have a special responsibility to lead the global effort against Climate Change. Reporter the u. S. Promises to cut Carbon Emissions at least 26 by 2025, doubling its pace. China promises to cap its emissions around 2030 or earlier and bump up its renewable and Nuclear Energy use to 20 . It gives us a fighting chance of heading off the worst impacts of Climate Change if other countries around the world now join them. Reporter for china it means kicking its coal habit. Coal accounts for 70 of chinas energy. And its on track to build a new coal plant every ten days for the next decade. But with 1. 3 billion customers, china could change the Renewable Energy landscape. This is going to help reduce the costs of Renewable Energy for all users around the world. Reporter here at home republicans are already putting up roadblocks if congressional action is needed. The agreement requires the chinese to do nothing at all for 16 years while these carbon emission regulations are creating havoc in my state and other states. Reporter now already the president has acted on his own doubling the vehicle fuel efficiency standards by 2025 and directing the epa to set limits on Carbon Emissions from power plants. A Pew Research Poll taken after the election shows that 64 of americans support stricter emission limits on those power plants. Brian. Anne thompson on the big environmental story today. Anne, thanks as always. Tonight, our friends at the Weather Channel are referring to whats happening right now across the country from north to south, east to west as the arctic outbreak. And its true. Records are falling, and its really cold out there. Nbcs Janet Shamlian is live for us in denver where its been a hundred years since it was this cold this early. Hey, janet, good evening. Reporter brian, good evening to you. Thats right, the mile high citys on track to shatter a record that was set in 1916. It has not gotten above 6 degrees, here today its currently 2 degrees. And this crush of cold is now pushing south and east. I70 is really reporter denver under siege from heavy snow and bone chilling cold. Truckers pulling out chains to ready their rigs, some not quite prepared for the deep freeze. Slick. Really slick. Reporter that familiar scrape, not usually this soon. This is beautiful colorado. Reporter from the air an oversized blanket of white. At majestic mt. Rush more, a time lapse look at the mounting snow. Steam rising from the platte river, casper the coldest at minus 26 degrees. The warnings are now widespread. Windchills are just brutal outside. Arctic blast is bearing down. Were running some 23 to 24 degrees below average reporter in 24 hours the temperatures dropped from the 80s to the 40s in brownsville, texas. In jackson, mississippi from 79 degrees to 45. And in charleston, west virginia, 75 down to 41, a 34degree difference. In the pacific northwest, 60mileanhour wind left 60,000 powerless in seattle. Crews battled gusts as they try to repair the lines. In oregon trees blocked roads and crashed into homes. As this system pushes east, fog blanketed big cities there today, boston skyline all but disappeared only the tallest buildings peaking from the clouds and this view from the statue of libertys torch. What stands out about this cold snap is its projected longevity. Denver and other locations could stay unusually cold for the middle of next week and longer. Janet shamlian in 2degree denver, colorado tonight. Janet, thanks. All this brings us to meteorologist janice huff in the Weather Center. Does this now change air patterns and move in to stay . Well, it looks like its going to stay for a while, brian. Theres not much of a change coming our way. Were going to see this cold dip all the way down to the gulf coast and spread to the east. These are the temperatures that were tracking over the next several days. You can see that by early on friday morning down into the deep south it will be in the 20s in birmingham, alabama and atlanta, georgia. And eventually some of this cold will reach even parts of north florida. This huge area of cold continues to spread south and eastward over the next several days. We go all the way into the weekend in the areas shaded in purple that will start to spread across the great lakes in towards the east coast early next week where temperatures may not get out of the 30s during the day in places like new york city and stay in the 20s during the day in places like chicago. And thanksgivings two weeks away, brian. Janice huff in the warmth of the Weather Center tonight. Janice, thanks. Scary moments today as the ground shook and shook hard in parts of kansas and oklahoma. 4. 8 magnitude earthquake centered near conway springs, kansas. Unclear how much damage was done. The u. S. Geological survey says 40 quakes with a magnitude 2. 5 or above have hit this general area over the past week. Todays was by far and away the largest. Here in new york today it was one of those look up in the sky moments in lower manhattan. Many others watched on Live Television as a scaffolding failed high above the city streets on the tallest building in the city, the new World Trade Center tower. Then to the rescue came the new York City Fire departments equipment of special forces. Our report tonight from nbcs stephanie gosk. Reporter the tallest building in the country, 68 floors up and one side of the scaffolding gave way. Two window washers left dangling. Both experienced workers seen earlier in the day in pictures posted on social media. At 12 42 the call came in. More than 100 new York City Firefighters responded. The department tweeted this photo from inside, an up close look at the terrifying angle of the scaffolding. The First Priority was securing the two workers. They dropped down to additional secure the members that were the workers on the scaffold. Reporter then rescuers had a choice, try to raise the scaffolding to the roof or cut through the thick glass with a diamond edge saw. They chose, they say, the safest option. But not an easy one. Worried about everybody below more importantly. The guy up there secure not going anywhere. Theyre going to take worker number one into the building. Reporter they brought them inside one at a time. Okay. We have a successful mission. Reporter both were taken to local hospitals with minor hypothermia. Lieutenant bill ryan and his company know this address well. They were one of the first teams called to the twin towers on september 11th. Do you think about that when your radio goes off its a run. It gets you kicking. We know the location. The rest is business. Do whats supposed to be done at that point and talk about it later. Reporter after an afternoon that put the city on edge, the day ended with a rescue new yorkers are proud to call a success. Isnt that something to see . Reporter stephanie gosk, nbc news, new york. A disturbing piece of video making the rounds on the web and elsewhere today. It shows three u. S. Navy sailors from the guided missile destroyer u. S. S. Ross docked in istanbul right now. The americans are dressed in civilian clothes and surrounded quickly by about a dozen activists calling them killers, shouting for all of them to leave turkey. They throw things at the sailors. At one point they put a bag over their heads. The americans do not retaliate. They do not fight back. They are then chased as they try to get away peacefully. A member of our team who lives there cautions that these were apparently the actions of a fringe group done for the benefit of cameras. And turkey, an american ally s generally hospitable to westerners. We are learning more tonight about how the pile of that Virgin Galactic spaceship managed to survive the explosion that killed his copilot. Peter siebold told the ntsb he was thrown clear from the aircraft still in his seat. His parachute only deployed after he unbuckled from his seat during the fall. He also told the ntsb he did not know his copilot has unlocked the braking system early. Alsbury was killed in the explosion and crash. Still ahead tonight, it could be the end of black friday as we know it. Could it be . Will the announcement from a giant in retailing change retailing this coming season . Also, crowded skies. The alarming report today about an increasing number of close calls in the air. Woman everyone in the nicu all the nurses wanted to watch him when he was there 118 days. Everything that you thought was important to you changes in light of having a child that needs you every moment. I wouldnt trade him for the world. Who matters most to you says the most about you. At massmutual were owned by our policyowners, and they matter most to us. If youre caring for a child with special needs, our innovative special care Program Offers strategies that can help. Why suffer more than you have to . You can do something different. Because the landscape of options has changed. Brisdelle is the only fda approved, nonhormonal option proven to reduce moderate to severe hot flashes during menopause. And the bedtime dose provides 24 hour relief. Brisdelle is not for everyone. Call your doctor if you have changes in mood or behavior, thoughts of suicide, or a high fever, stiff muscles or confusion, signs of a possible lifethreatening condition. Abnormal bleeding, bone fractures restlessness, vision problems, and impaired judgment and motor skills may occur. Dont take brisdelle if you are pregnant, taking maois thioridazine, pimozide, or are allergic to paroxetine. Tell your doctor about all your medicines like tamoxifen, triptans, or paroxetine. Side effects include nausea, vomiting, tiredness, and headache. Change is in the air. Its time to talk to your doctor about the only fda approved, nonhormonal option. Brisdelle. We are back with a story here tonight that could spell the end of what has become black friday. But before you think about leaving your thanksgiving table, getting in line, braving the stampede, you might find deals just as good or better right now. Our report tonight from nbcs tom costello. Reporter the leaves havent even all come down yet, but already at your local store the Holiday Shopping season is here. I love a good deal. Deals make you spend money. And thats how they get you. Reporter but is it a deal . Nerd wallet has found very often black friday prices arent so special after all. Example, the listed upcoming black friday sales price for a north face jacket at sports authority, 99. But it sold for that just last week. A slow cooker at sears is black friday priced 19. 99, the same price as last thursday. And the 50inch rca television at kmart, black friday priced 399, same as september 28. Retailers are banking on the fact we just dont have time to be tracking prices month by month, week by week. Were busy. Especially around the holidays. Reporter black friday itself is turning into its own season. Target already offering black friday deals online. The real deals start the sunday before thanksgiving. Walmart plans five days of sales starting on thanksgiving. Many more Stores Offering deals all month. Cnbcs Courtney Reagan covers retail. On average for most retailers the holiday season, november to december, represents anywhere from 10 to 30 of their total sales for the year. Reporter so the best days for bargains . A new study by adoeb finds the largest single day price drop is expected sunday to monday before thanksgiving. But the entire thanksgiving week most items will be discounted 20 . The best online deals expected on thanksgiving day itself average discount 24 . Im a little sick and tired of getting into the lastminute rush, you know . Reporter again this season predictions are for a strong holiday sales as retailers bet that by extending black friday consumers can be enticed to spend even more. Tom costello, nbc news, bethesda, maryland. We are back in just a moment with a troubling sign of our times, what most americans feel has gotten wildly out of control. See this . It shows the pressure points on my tired, achy feet. I had no clue i was putting this kind of stress on my feet. I have flat feet. I found this out at the free dr. Scholls foot mapping center. In less than two minutes, i got my foot map and my custom number. Im a 440. Im a 210. 340. That number matched the dr. Scholls custom fit orthotic inserts with just the right support to help relieve stress on my feet. Im a believer. Go to drscholls. Com for locations and save 10 prof. Burke the more you learn the more gaps you may find. Like how you thought you were covered for this. pirate ahh, haha prof. Burke . When youre really only covered for this. pirate boy ahhh, haha prof. Burke talk to farmers and get smarter about your insurance. We are farmers bumpadum, bumbumbumbum what if one push up couldcoli cprevent Heart Disease . Cancer . One. Wishful thinking, right . But there is one step you can take to help prevent another serious disease pneumococcal pneumonia. One dose of the prevnar 13 ® vaccine can help protect you. From pneumococcal pneumonia, an illness that can cause coughing, chest pain, difficulty breathing, and may even put you in the hospital. Prevnar 13 is used in adults 50 and older to help prevent infections from 13 strains of the bacteria that cause pneumococcal pneumonia. You should not receive prevnar 13 if youve had a severe allergic reaction to the vaccine or its ingredients. If you have a weakened immune system, you may have a lower response to the vaccine. Common side effects were pain, redness, or swelling at the injection site. Limited arm movement, fatigue, head ache muscle or joint pain, less appetite, chills, or rash. Even if youve already been vaccinated with another pneumonia vaccine, prevnar 13 ® may help provide additional protection. Get this one done. Ask your healthcare professional about prevnar 13 ® today. I have 40,ney do you have in your pocket right now . 21. Could something that small make an impact on something as big as your retirement . I dont think so. Well if you start putting that towards your retirement every week and let it grow over time, for twenty to thirty years, that retirement challenge might not seem so big after all. [ male announcer ] the rhythm of life. [ whistle blowing ] where do you hear that beat . Campbells healthy request soup lets you hear it in your heart. [ basketball bouncing ] heart healthy. [ mm. ] great taste. [ tapping ] sounds good. Campbells healthy request. Mm mm good. ® lets hear that music. We have a senate race to call. In alaska, eight days after the election we can now report the republican dan sullivan is the apparent winner of the u. S. Senate seat. The Associated Press has declared him the winner flat