After the high tides that rob was talking about. Incredible pictures. A colorful walk with a stern message. About 100 people marched today, they wanted people to listen to what they had to say and their call for action against gun violence. Christie smith is live in San Francisco tonight where those who are wearing an orange shirt, christy, apparently that was their sign that they wanted to make their voices heard. Yeah, thats right and they gathered to mark the anniversary, to the grim anniversary of the shooting at sandy hook elementary school. But also talk about ways to end gun violence. Now there are events happening here in San Francisco, but also a large gathering in the east bay in walnut creek, with the Group Moms Demand Action for gun sense. About 150 people gathered near Broadway Plaza for what they call an orange walk. Also today mentioned was the recent shooting in bernardi bernardino. They paid respects for those who died in connecticut and all of those who died of gun veils. In the east bay, part pants say there are concrete steps that they try and urge people to take. The way that the organizations are fighting against us, we just need to swell up and Everybody Needs to do their part to come out and speak against gun violence. Now there were similar events held in the north bay, along the peninsula and in cities across the countiry. Thats the latest, reporting life from San Francisco, christie smith, nbc bay area news. Exchanging guns for cash today, no questions asked gun buy back event was held around San Francisco and around the Police Department there. This is just a small picture of the haul that was brought in today. This is going on in front of an Advocacy Office on howard street. About halfway through the event, were told there were already 150 weapons turned in. No questions asked, you come in with machineguns, 150 and hand guns are 100. We cant ask no questions and get a little bit of cash before christmas and buy some christmas for the youngsters. More than 950 guns have been turned in since they started the events in 2011. Were learning more tonight about the suspicious letter delivered to a bay area islamic advocacy group. Authorities confirm that the white powder self identified only as infidel. The powder inside the envelope not dangerous. The concern over backlash in the wake of recent terrorist related attacks is growing. Chuck . Reporter well, terry, the organization where the letter arrived, the council on American Islamic relations, is across the street in this mosque behind me in santa clara, that carries the nations largest siccivil libers group and the director expressed the overwhelming support in the days sense. At the Muslim Association met with people to discuss how muslims are reacting to the attacks and to the backlash. The community is very shocked about the events that have taken place, not just the acts of terrorism themselves, but the backlash against the muslim community. So this is a time when we are regrouping, were addressing the concerns that people have, especially the youth that are most affected by this. Another suspicious letter arrived at cares washington, d. C. Office last thursday. The contents of that letter were tested and not found to be dangerous. No one was injured in either incident, but the fisher is investigating both and locally, care says it is stepping up measures to take precautionary measures in the days ahead. Reporting live in santa clara, im chuck coppola. Heres video of the closure on embarcadero and bryant. The bomb squad responded and it turned out to be a backpack. The embarcadero was reopened. Tonight were hearing from the doctor who worked with a tb infected nurse. She tested positive, but dr. Ohara says she still wasnt showing common sign of tb. She was not coughing so we would consider her to be a very low risk for actually spreading tuberculosis to most individuals. Tuberculosis mostly affects the lungs and is spread through the air, the hospital is taking all precautions especially since babies are the most at risk. Hundreds of parent who is visited the hospital with Young Children are being told to start their kids on a preventive tb medication. A man with police say this man Justin Skannal stabbed his former motherinlaw when she would. Tell him where to find his estranged life. This happened monday at to the womans home. Police say that skannal is still on the loose. He has ties to the criminal street gang in sacramento. It is a parents worst nightmare, a School Bus Driver is under arrest tonight under suspicion of drunk driving while taking 28 students home in napa county. The School Bus Driver has been identified and no students were injured. A popular holiday event in San Francisco is turning into a nightmare before christmas for some Business Owners. Every year, santacon. The events been taking place for 21 years now, but the last few years, more and more Business Owners have been complaining some of the santas are getting out of control, getting too drunk, acting bad ly. So this year, some bars and restaurants are banning anyone dressed up at st. Nick. And some are just banning drunk santas. Those santas drop off toys for the San Diego Fire Department annual toy drive. Santas are finding their way upper here, a lot of monetary donations that we need to purchase toys. Theyll give the toys to more than 40,000 children in the bay area. They do some great work donating. Thousands of homes are under construction in the south bay. Coming up, why some people are trying to put a stop to the building boom. The Heisman Trophy winner about to be unveiled. A stanford player is in the running, is he going to get the honor . Well see. Too soon. Its a common complaint in several bay area cities including gilroy. Now, theres a petition to stop a development of 4thousand homes. Heres nbc bay areas ryann blacksherevargas. Take pkg oc standard. Runs 1 32 rr theres a peat to stop the development of 4,000 homes. We just need to be heard. These women started the petition because theyre concerned too much land is being lost. I was born and raised in this community and my family has been farming here since the 50s and so farming is something thats dying out, so much prime farm land such as this has been taken for housing. Reporter the area for the housing extends on the north and south side. The total area is 71 acres. Everybody thats living here ends up getting on 101. Clogging the freeways and driving north. Congressman velasco says a proposed Housing Project will only add to the citys congesti congestion. The housing complex isnt expected to be built for ten years, but some are expected to be built soon. San jose has 10,150 houses under construction now or in the pipeline over the next few years. Lets see how that housing impacts our general fund. Reporter yet other city leaders say more housing brings more jobs. Theyre a necessary evil. You cant expect companies to come down here and build in gilroy and not have any places for their ecmployees to live. Reporter these residents say they want the place they lived for years to keep feeling like home. We do believe that gilmore is a small town, its known for being a small town and we would like to keep it a small town. The Housing Project still needs eat layer of approval from Santa Clara County by early next year. Coming up next, should teenagers be allowed to drive big rig trucks . Change in the law now making that possible. Plus the issues that are already servicing the coast. Im sam brock, the paris talks almost over and World Leaders appear on the verge of an unprecedented deal. So why do critics call it meaning list. We have fact checked the force or utility of a climate deal next. Thats the picture in parisas leaders from across the globe agree today on a critical climate plan. Peggy 2shot th a world i dont think nighted, that is at least the picture from paris. Leaders across the globe agreed today on a critical climb hat plan. The issues in this years talk have been historic. Lets check out what the results could mean in tonights reality check. Reporter new drone footage of the arctic showing melting ice and melting glaciers, chilling, but not nearly as chilling as what might happen if we dont cut our emissions. Scientists point out drought, Food Shortages and even on the world stage steps president obama and governor jerry brown and a host of World Leaders hoping to prevent a disaster. Adele morris at the Brookings Institution think thank says the meeting is unprecedented. Whats unique about this meeting is its the first time all countries, all major emitters or nearly all of them have pledged to take action. But will the action be anywhere close to enough . Criticism of shoddy standards splashes headlines these days. The talks are rigged to ensure an agreement is reached regardless of how little action countries plan actually taking. Is it voluntary carbon reductions. Almost every country is coming forward with its pledge that it designed itself for what emissions objectives theyre going to bring to the table. In other words, countries are making up their own benchmarks. The good news, 150 nations are pledging. You can look at their proposals on the u. N. Website. The bad news, were falling far short of what we need. For the better part of a decade, scientists have said a 2degree rise in Global Temperatures is the magic number, the bare minimum we cant break to avoid catastrophic climate change. If we continue on our current policies, we would be at almost double that, about 3. 8 degrees celsius by 2100. Should all countries in the conference keep their pledges, the world would warm on average of 2. 0 degrees celsius. Better but not near the benchmark. This is a critical step, but the problem is a big problem, and its not going to be an easy one to solve, particularly in the context of u. S. Politics. Reporter ah yes, the politics. 26 states have taken the Obama Administration to court over recently tightened epa standards. The justices could unravel u. S. Efforts to lead on climate change. So could a future president. A were the Supreme Court to strike down the regulations, what would a Republican Administration in 2013 say to walk back from these commitments . The fact that the u. S. Has gotten back together could change very quickly. Even if the Obama Administration wins in court. Even if it supports the paris plan. A climate deal demands contributions in the billions, from rich countries to poor and developing ones. Republican lawmakers have said that money might be dead on arrival. Bottom line, paris offers real hope of getting more countries involved in fighting climate change. But the world is still behind. And the world leader is only here kicking and screaming. We mentioned it earlier in the newscast, it is beginning to look a lot like christmas. It certainly is, especially on the presence. Lets take you live here to palo al alto. This is Christmas Tree lane, a tradition here. Its been going on for 75 years, look at these adorable characters. Your nose so bright sne oh, no. What do you mean oh, no . Tonight could be the night to the see to the lights, if you have never been, youve got to head over there to palo alto because neighbors are really getting into it. I love the santa hat, ive got two. Meteorologist rob mayeda, ive got two. You could be in nevada during the day, as the winds are really going to be gusty. Gorgeous out there this evening, a few misty skies, and from san bernardino, the camera nice and steady, its not going to be like that tomorrow morning, its going to get very gusty around the bay area tomorrow morning. 56 christmas in the park, dry for now, and radar agrees with that view as you can see most of the reain on the north coast, this system right there, its still getting reaction in the north bay, at dawn tomorrow, you see the heaviest rain in sonoma county. Then we head towards 11 00 in the morning, notice how in the north bay, youre already getting to see a break. Now the central bay down to san jose getting slammed by some rain. A quick mover by noon, south of san jose, now were looking at partly cloudy, windy with a few showers, so the system moving through very quickly, it will pack a pretty good punch there in the morning. About a halfinch rainfall totals we could get one to two inches of rain. This time we expect to see gusty winds, the south bay hills, east bay hills, peninsula and San Francisco. Look at the time there, 8 00 a. M. Tomorrow, through 10 00 tomorrow night a rainy afternoon, youll see those gusty winds at times. You can see on the future cast for winds. As the cold front drives on through, winds shift, help to clear our skies, but its going to be very blustery, probably a lot of chop in the water, probably around the embarcadero, with those wind speeds 30 to 40 miles an hour with those gusts in the afternoon. In the morning, the wettest part of the day, you can already see our skies begin to clear as we head through mid afternoon, but those temperatures staying down, another case of gulf of alaska air conditioning during the day tomorrow. Highs in the mid 50s no matter where you go. Around santa rosa, mid 50s around livermore and pleasantton. We got a winter storm warning, one to two feet of snow coming down, thats all the way up to 11 00 tomorrow night. And speaking of the sierra, evening though we have had some snowstorms, the latest check of that sierra snow pack still about 52 of average today. One to two feet of snow coming down as we go through the next 24 hours, and notice the calendar as we move ahead. A little dry here for monday, as the forecast shows at the bottom of the screen, but focus on thursday, friday and saturday, were going to see another system set up, that heads to the second half of the week, that promises to bring more rain and more sierra snow towards the end of the sevenday forecast, a windy and rainy day tomorrow, especially to start and more to come over the next seven days, back to you. Good to see that moisture coming to the area, thats for sure. Ing ucoming up, certain teens able to get behind the wheel of a big rig truck. Ive got two teenagers and thats a scary idea. What it means for safety out on to the roads. The new transportation bill president obama signed in the nick of time just hours before the old one expired friday includes something you may not have realized the new transportation bill president obama signed just hours before it would have expired on friday includes something that many people would not have realized. It allows 18, 19 and 20yearolds to drive big rig trucks across state lines. This could lead to teenagers crisscrossing the country. Terrell jones has been driving trucks since he was 18. Its not just yourself youre looking out for, when youre driving, you got to look out for all the drivers around you. 14 states license Truck Drivers as long as they stay s stayed within state lines, to the new highway bill allows 18 to 20yearolds to drive if they learned to drive in the military. Why are we letting them drive when we see the studies that show are have four to skix tiix the fatal crash rates of older drivers. Chuck kuhn says theres no difference between driving in the state and out of the state. Reporter safety is a concern, advocates say 10 people die every day in truck accidents and its usually the people in the other vehicle who get killed. They want more safety studies. Truck Companies Want more drivers. There are nearly 3. 5 million now. Industry leaders predict theyll need to hire 890,000 drivers over the next decade to keep up with growth and to replace retirees. As long as the Companies Keep an eye on those Young Drivers and get proper training i think it would be just fine. Turning to teens to drive long distances could let drivers like terrell get food and clothing from the factory to the stores. Well be right back. Stanfords Christian Mccaffrey up for the prestigious heisman award. The ceremony still going on right now. Mccaffrey broke the ncaa re f right now at 5 29. Christian mccaffrey up for the prestigious heisman award. He broke the ncaa record that was previously held by barry sanders. We were already discussing all other contenders, he has some stiff competition. Its pretty crazy. Nbc boxing up next, then more local news at 8 30. Weal see you then, have a nice night. Saturday night in South Central texas. San antonio, a city best known for the alamo, but just a short trip away its the at t center with a evening of boxing is already underway andx it tks native, Omar Figueroa jr. Will put his record on the line as he faces a fellow former champion , antonio demarco. Thats tonights main event