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NASHVILLE, Tennessee — What was supposed to be a moment of solidarity and respect, became what has been described as a time of chaos at Antioch High School in Nashville during National Walkout Day.According to Metro Nashville Police officials, during the walkout a few students took down a flag and then jumped on a police car.Police said they were working to identify who was responsible. No arrests or citations have been issued.Students across Middle Tennessee and across the country participated in the National School Walkout.Students and teachers stood outside their schools to observe a moment of silence, lasting 17 minutes to help honor the victims killed in the Parkland, Florida school shooting last month. Metro Nashville Public Schools' Public Information Officer Michelle Michaud released the following statement:  881

Moderna is asking American regulators to allow emergency use of its COVID-19 vaccine. It says its final results show the vaccine is 94% effective.The drug maker says it had 196 COVID-19 cases so far in its study. It says 185 of those participants received the placebo, while 11 got the real vaccine. The 30 people who became seriously ill in the trial didn't get the vaccine.FDA advisors are expected to look at all the evidence on December 17. They'll be checking out Pfizer’s vaccine on December 10.Pfizer and Moderna's success with their COVID-19 trials could impact how vaccines are made in the future.It has to do with how they work. They use what's called messenger RNA (mRNA) technology. The virus' genetic code is injected into the body so it can instruct cells on what antibodies to produce.It hasn't been approved to be used in a commercial vaccine before.“In the future, it's clearly going to be tough to beat RNA vaccines for speed and that's a wonderful thing. Just this demonstration of how incredibly fast they can move has been great. How effective they can be, I think will depend on a particular disease,” said Shane Crotty, Ph.D. with the La Jolla Institute for Immunology.Crotty says the narrowest application for this vaccine technology in the future is a similar situation where there's a new emerging virus."The mRNA vaccine has been tried for other infectious diseases and they have been investigated for cancer. There's a whole area of trying to vaccine against cancer, which has kind of been an elusive target,” said Dr. Alessandro Sette with the La Jolla Institute for Immunology.A big question with an mRNA vaccine is how long its protection will last. While there is encouraging findings, there's no historical comparison to look at.A big thing experts say has helped with a vaccine is there has been a lot of money put towards manufacturing before we even knew it would work.Click here to learn more about mRNA vaccines. 1958

Moderator Kristen Welker, with the help of an offstage mute button, helped give Americans a substantive head-to-head debate over leadership that had been missing during the presidential campaign. The NBC News White House correspondent, in her first time moderating a general election debate, kept tight control of the discussion between President Donald Trump and Democrat Joe Biden. Trump, possibly deterred by the mute button, resisted the interruptions that led to criticism of his performance in the first debate. Welker guided the candidates through discussions about the coronavirus, climate change, health care and race in America.While Thursday marked Welker's first time moderating a debate between two nominees, she was among a panel of NBC News moderators who led a Democratic debate last year. Welker earned praise from her colleagues both at NBC News and the White House Press Corps. 905

Montgomery County, Maryland Police reported Laura Wallen, a pregnant high school teacher who went missing last week, has been found dead. According to Montgomery County Police Chief Tom Manger, Wallen's body was found in a wooded area in Damascus, Maryland. Police have arrested her boyfriend, Tyler Tessier.Tessier was present with Wallen's family during a press conference on Monday. Police had already identified him as a person of interest in the case. Detectives asked the family to invite him to speak as part of the investigation. During the press conference, Tessier pleaded for Wallen to come home."There's so many people, so people that miss you," he said Monday. "There's so many people that were out looking. We haven't slept, we haven't eaten. We're just looking and praying that you're safe and I'm asking that you can just let us know that you're safe."Police have not determined a motive in the case, though during Wednesday's update, police said Tessier was living at several addresses, including one in Damascus.  1079

MINNEAPOLIS, Minn. – Attorneys for the family of George Floyd announced Wednesday that they’ve filed a lawsuit against the City of Minneapolis and the four officers involved in the 46-year-old’s death on Memorial Day.Watch the attorneys press conference below:The federal lawsuit was filed in the U.S. District Court for the District of Minnesota. It names the city and former officers Derek Chauvin, Tou Thao, Thomas Lane, and J. Alexander Kueng as the defendants in the case.The lawsuit claims the city is responsible for a police culture of excessive force, racism and impunity.The complaint is seeking compensatory and special damages and costs as defined under federal law in an amount to be determined by a jury. The suit is also asking for the appointment of a receiver or similar authority to ensure that the City of Minneapolis properly trains and supervises its police officers.Floyd died in police custody the night of May 25 after former officer Chauvin pressed his knee against the handcuffed man’s neck for several minutes while he said, “I can’t breathe.” The incident was captured on video, which quickly spread online and led to worldwide protests with activists calling for justice and racial equality.“This complaint shows what we have said all along, that Mr. Floyd died because the weight of the entire Minneapolis Police Department was on his neck,” said attorney Ben Crump in a press release. “The City of Minneapolis has a history of policies, procedures and deliberate indifference that violates the rights of arrestees, particularly Black men, and highlights the need for officer training and discipline. This is an unprecedented case, and with this lawsuit we seek to set a precedent that makes it financially prohibitive for police to wrongfully kill marginalized people -- especially Black people -- in the future.”Chauvin has been charged with second-degree murder, third-degree murder and manslaughter. Three other officers at the scene —Thao, Lane, and Kueng — are charged with aiding and abetting both second-degree murder and manslaughter.“The Floyd family deserves justice for the inhumane way in which officers with the Minneapolis Police Department killed Mr. Floyd,” said attorney L. Chris Stewart. “Furthermore, the City has a responsibility to acknowledge the history and practices of excessive force and impunity with its police force, as well as shortfalls in officer training and discipline.”The complaint claims that the police department knows prone restraint can be deadly, and that its officers were supposed to receive appropriate training, but it had inconsistent policies and infrequent training to educate officers.The complaint states that MPD training to all officers designated and approved neck restraints as a “non-deadly force” option and encouraged officers to “compress veins, arteries nerves, and muscles of the neck” of arrestees. 2899