On cancer. Nightlylyews begins right now. Good evening. There are calls for calm as protests gather in baltimore, hos after a jury failed to reach a verdict in the trial of a Police Officer in a case t tt triggered riots throughout the city in april. It was the first of six Police Officers charged in connection with the death of freddie grayho died while in police custody. Late today the judge declared a mistrial in the case of manslaughter and now the decision whether to retry him. Ron mott with late details. As word of a mistrial spread, cries of protest and scuffles. A jury failing to reach a verdict in the porter, charged with manslaughter in the death of freddie gray. Tonight his family and supporters remain hopeful justice will be served. This is just a temporary bump on the road to justice. We are calm. You should be calm too. Reporter the start argued porter showed indifferent to gray while not securing him in a seabelt following his arrest last april in a van d not getting him medical help. The jury deadlocked, including seconddegree assault and Reckless Endangerment a misconduct in office. Gray suffered a broken neck and died a week later. R. Touching off more than a week of fiery riots, the worst violence in the city in decades. This admitted gang member sought to squelch today hou before the mistrial announcement. You are mad and angry and want to tear stuff up. I understand. But that is not the right way to go. Is it worth retrying him . I would like to know the divide in the jury. Analysts contend the mistrial could make upcoming cases against five other Police Officers including the van driver charged with seconddegree murder even more challenging for prosecutors. This was one of the easier cases to defend because he was not one of the principals that placed freddie gray inn the situation he was in. Reporter and tonight city officials also called for calm. All of us, if we believe in justice, must have respect for e outcome of the judicial process. Reporter the family of freddie gray had already reached a 6. 4 million settlement with the city, city bracing for what could be a long night of demonstrations. The second trial set to start next month and the defendant is the officer who drove that van. Ron mott, thanks. Big news about the economy tonight and it affects everything from your mortgage to your 401 k . For the first time in a decade, the Federal Reserve raised Interest Rate a quarter point. Economy is improving. On wall street stocks finished up across the board. But after years of the cost to borrow money being virtually nothing it is getting more expensive. Olivia sterns explains. Reporter like so many families,he hepners new this day would come and when they found their drere home, they acted fast. Our feeling is that if Interest Rates go up and you are paying more por month on your mortgage thais less of a houou yououould buy. Reporter and today, a week after they moved in, the Federal Reserve voted unanimously to raise the Interest Rate affective immediately. It reflects the committees confidence that the economy will continue to strengthen. Reporter the increase will affect rates on everything from credit cards to 401 k s, mortgages and car loans. The fed is expected to raise rates. The impact is consequential but it mounts over time. So if we get down the road over 12 months and they hike the Interest Rates a few when you notice. For a familil looking to take out a 300,000 mortgage, the quarter rate hike could mean paying additional 530 per year. If they raise it twice more, that payment would jump by nearly 1,600 a year. But a rate hike isnt all bad news for your wallet. It helps encourage saving, may lead to more income for retirees and a stronger dollar is good for americans traveling abroad. Despite the hike, rates are stillll near alltime lows. And Americans Still looking for their dream home still have time to buy. And lester, the focus is on h h fast the rates go up the next 12 to 18 months, continues to improve. The last thing they want to do is raise them too fast and knock the recovery off course. Olivia, thank you. And last nights debate was one of the fiercest so far. Senator marco rubio had one of the most talked about performances of the debate. And today Hallie Jackson talked with him, and donald trump came out swinging. Donald trumum sticking the lananng on a victory lap, like he is the nominee, promising if he is not, he wont run as an independent. Im totally committed to the republican party. I feel honored t t be the frontrunner. Reporter the donald trump battle everyone expected with ted cruz never materialized. But one with jeb bus did. You will never be president of the United States by last night i have jeb come at me. Low energy. And in another corner, cruz versus National Security and immigration. The ted cruz rule out ever legalizing people in this country senator . I will i have never supported legalization and i do not intend to support it. Cruz counter punch aimed at the pathway to citizenship, part of the immigration reformrme tried to pass in 2013. Now a liability. Do you regret having been a part of that process. No. I went to washington to solve problems. You cant do it o o one piece of legislation. I do not believe it is good for america to have millions of people permanently living here that could never become americans. Our interview part of a fastmoving dayay on the campapan trail. The tape between you and mr. Cruz. In New Hampshire and in iowa. Do you always have the Des Moines Register on the plane. No. Only when we are here. Were happy about the headline today. Hes campaigned less than ted cruz. Im motivated by because that is where i am and where i come from. I feel very confident and optimistic about it. Reporter and while rubio still trailed his republican rival in iowa, both sit behind the frontrunner tionally. In this republican race, there is donald trump and then everyone else. Just like donald trump. Just like trp. But smaller. Reporter nationally nobodys poll numbers in the race are just like donald trump. But across the early states cruz and rubio have become part of the top titi. Those thrhr candidates have the momentum before last nights debate and they still have it heading into the holiday break. Lester. Hallie jackson, thanks. In southern n california, back to normal after hundreds of schools back open after the hoax in the second large school district. Crisis counselors were on hanan for kids who wanted to talk about what happened. The fbi is still trying to determine threats. There are new revelations in the investigation of the terrorist attack in San Bernardino. What the fbi is now saying about reports the female killer posted jihadist messages on social media that werent caught during a background check to earn her visa to the u. S. Our justice correspondent Pete Williams on the trail of terror. It is an urgent question. Why did theovernment givealik a visa to enter the u. S. If he was posting projihadist messages before she got here. Simple,aid the fbi director, she never did post messages back then. Sent only emails and direct private communications to her fiance in the u. S. , farook. So far in the investigation we have found no evidence of posting on social media by either of them at that period of time and therefore reflecting their commitment to jihad or martyrdom. Reporter after the malik did post a pledge of support for isis on a facebook timeline. Comby said the fbi has founun no indication at the couple was in direct contact with Foreign Terror Organization before the shooting or part of a cell. Still unanswered, he said, what else were they plannini. And the secretary of Homeland Security said he will begin issuing periodic bulletins to describe the changing nature of the terrorist threat nationwide. Without raising the overall threat level as the old system did or waiting for specific threats. We want to put in one place for the public to see what we are seeing concerning the homeland and what we are doing abobo it and what the public can do about it. Reporter the first such bulletin on the dhs website today describing the selfradicalized extremists who could strike with little or no notice. Future bulletins may advise more screening super bowl or when security is ramped up. And tonight the white house said the president will meet with shooting victims and family members in San Bernardino on friday. He will then head on to hawaii with his family for the holidays. Pete, thanks. A new study out today could change the way doctors treat a all too Common Health emergency. For decades the goto for appendicitis is surgery. But now as rehema ellis explains, doctors are skplaning a new options for children that may eliminate the trip to the operating room. Today this 12yearold remembers the painful appendicitis that nearly ruined his familys trip to disney world. It was kind of likik somebody was stabbing me over and over again every time i would move. She had never been sick like ts before so i was very afraid for her safety. Reporter but instead of surgery, she was treated with ant antibiotics. Being the first study early and mild cases of appendicitis in children. She was able to go home a day or two later. Reporter the small study found with antibiotic as loan, 95 of the children improved within 24 hours a a were discharged without undergoing surgery. A recent study in europe showed similar success for adults resulting in less Recovery Time and lower health costs. The classic symptoms include pain around the naval, moving to the right side. Also nausea and fever. The new study found one in four young patient cases were mild enough to avoid surgery. In order to meet that criteria, you have to have pain for less than two days an the inflammation has to be contained within at pendism. So there is no sign it is about to rupture or has ruptured. Reporter and for most it didnt flareup again. They didnt say you must have surgery or antibiotics. Wonderful thing for us. Reporter a choice that worked for the gibsons who made it t t disney world and she has been symptomfree for two years. Rehema ellis, nbc news, new york. Still ahead, exclusive access inside of the top secret Los Alamos Nuclear lab where the Technology Behind the most destructive weapons known to man is being used i woman itbeen a journey to get where i am. 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With an nbc news exclusive. Rare access into the Los Alamos Nuclear facility. It will be known as one of the birthplaces of the ato theic bomb and also being used to develop a very different kind of weapon. One that puts los alamos on the cuttingge in the babale against cancer. Janet shamlian has more on our special series of reports, target cancer changing the cure. Tucked away. Los alamos. A top weapons Nuclear Weapons lab. Today at the forefront of groundbreaking research that could fight cancer. We obtained access to the highly secure compound. Where eva burn balm showed us how t ty are manufactured a radioactive treatment that targeted tumors but doesnt kill the healthy tissue around that. This glass window panes of leaded glass three feet thick to offer us radioactivity. The material so toxic, scientist use robotic arms to work with them. So that piece that has to be lifted up and placed on top of the other piece, just like that. Very good. Reporter here is how it works. A disk is platted with a proton beam, making a cloud of radioactive particles partnered with a protein to make act tini um 225. Think of it as a laser directly to cancer cells. In terms of breakkroughs in Cancer Treatment in the past couple of decades, how important is this. I think this is tremendous. If we could get the pieces to workt together, t ts should be a very affective way to treat cancer in the treatment. This doctor tested the therapy on ial. Some went into remission. This is a more focused radiation and more precise and allowed sufficient killing of the targeted cell alone. R rorter dococrs hope los alamos will boost production and help patients with many cancers. I think well see faster progress and see this going global. Reportete Nuclear Technology once used for destruction now focused on saving lives. Janet shamlian, nbc news, los alamos, newew mexico. Tomorrow, the quick freeze therapy being used to prevent the Fastest Growing forms of cancer in america. When we come back. Are medical chappers used too often. Serious safety you owned your car for four years, you named it brad. You loved brad. And then you totaled him. You twtwhad been through erything together. Two boyfriends, three jobs. Then Liberty Mutual calls, and you break into your happy dance. If you sign up for better car replacement , well pay for a car thats a model year newer with 15,000 fewer miles than your old one. See Car Insurance in a whole new light. Berty mutual insuranan. Hey im here on the red carpet where our next arrival is. Whoa toenail fungus . Fight it with jublia. Jublia is a prescription medicine used to treat toenail fungus. Use jublia as instructed by your doctor. Are you getting this . most common side effects include ingrown toenail, application site redness, itching, swelling, burning or stinging, blisters, and pain. Oh, epic moves, big j fight it getting ready for your closeup . Ask your doctor if jublia is right for you. 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The second deadlyy crash involving an air ambulance in a week raising concerns yet again about this growing industry. 1500 med evac choppers transport 400,000 patients each year. Here is tom costello. Reporter the crash scene in arizona, rugged and snowowovered. The ems c cpper crash killed a pilot and flight nurse. The second in five days n. California last week four died. Nationwide since 2004 there have been 46 crashes killed 128 people. Our purpose is losing them,and no one is more invested in safety than the air crew members and the clinicians that climb into a medical reporter last year the faa issued for helicopter operators, improved communications, training and on board safety equipment. But the faa didnt order the night vision goggles or auto pilot that the ntsb still wants. Nationwide 7 7are government owned. By counties cities or state. The vast majority are owned by companies, many competing for business. And while they save thousands of lives every year, many medical professions argue that the vast majority of patients arent critical enough to be airlifted. We look at flights where had the patient simply been transported in the ambulance instead of waiting on a helicopter, they would have gotten to a helicopter quicker. Reporter med evac said many volunteers avoidance and googles but this is once again under scrutiny. Tom costello, nbc virginia. Were back in a moment with a touching reunion between a man they are not just best friends but also part ya know, viagra helps guys with erectile dysfunction get and keep an erection. Talk to your doctor about viagra. Ask your doctor if your heart is healthy enough fororex. Do not take viagra if you take nitrates for chest pain or adempas for pulmonary hypertension. Your Blood Pressure could drop to an unsafe level. To avoid longterm injury, seek immediate medical help for an erection lasting more than four hours. 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For Lance Corporal david pond the wait was longer than the war. People have this perception that it is 30yearold men that fight wars and it is not. It is 19yearold kids. Reporter in afghanistan his mission was dangerous, searching for roadside bombs with his partner. A belgian dog named pablo. Most people would run away from explosives. Yeah. You guys ran toward them. Pretty much. So you had a bond. We did. It was love at first sight. He trusted pablo with his life. One mistake, one misscent to be catastrophic. He was my foundation. All i knew was how to be deployed with this dog. But when he returned home, he found a different battle. Ptsd. I just broke. So how much did you miss pablo . Every day. He needed his old frieie more than ever. Pablo is now working at a marine base in georgia. So his former handler started a new mission to adopt him and to help make his case, clegtingng more than 187,000 signatures in an online petition. You are truly mans best friend. Mission complete, marine. Reporter on this day david ponds long waitits over. His partner officially retired and reunited. I dont have kids but it my son. It is the closest thing to a son i have. Reporter mission accomplished. News, albany, georgia. And that will do it for us on a wednesday night. Im lester holt. For all of us at nbc news, thank you for watching and good night. Time of an officer involved shooting involving an eastern iowa man. Plus a womans Christmas Joy is returned after an anonymous person donates christms lights to her after her lights were stolen. And with the help of taxpayers waterloo schools are hoping to youre watching kwwl, weve got uou covered. This is the news at six. Good evening, thanks for joining us, im amanda goodman. Ron is on assignment. Hell be back at ten. Temperatures in eastern iowa are starting to remind us its winter again lets go to storm track seven chief meteoroloist Mark Schnackenberg now for youfirst orecast. From the kwwl stormtrack 7 weather team. See the screen information from the kwwl sky remains mostly cloudy