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Tesla on Thursday recalled about 123,000 Model S sedans, asking customers with cars built before April of 2016 to have their power steering bolts replaced.A Tesla spokesperson said the company has observed "excessive corrosion" of the part in some cold climates where a certain type of road salt is used.No injuries or accidents have been reported in connection with the issue, the spokesperson said.A Tesla spokesperson said that if the bolts fail, the driver should still be able to control the vehicle. The issue can make the car more difficult to steer at low speeds and to parallel park, and it should "not materially affect control at high speed."The company sent out emails to Model S owners who have cars included in the recall.The Model S has been lauded for its safety ratings, but news of this recall comes at a rough time for Tesla.Its stock price has plunged more than 25% over the past month. Investors are worried about the startup's ability to deliver on its first mass-market car, the Model 3, which has been plagued by manufacturing woes.Tesla's stock sank nearly 4% during after-hours trading Thursday after news broke about the Model S recall. 1171

Students across the country are expected to walk out of their classrooms Wednesday morning to protest gun violence. The National School Walkout is scheduled to begin at 10 a.m. in every time zone and last for 17 minutes -- a minute for each life lost in the Parkland school shooting.If you're a student who's thinking of taking part (or the parent of one), you probably have lots of questions: Can the school retaliate? Will it hurt your chances of college? Can you just stay home for the day?For help with answers, we turned to a couple of experts:Ben Wizner is the director of the ACLU's Speech, Privacy, and Technology Project and an adjunct professor at New York University School of Law. He's litigated numerous cases involving the intersection of civil liberties and national security. He's also the principal legal advisor to Edward Snowden.Christine V. Hamiel is an attorney at the von Briesen & Roper law firm in Milwaukee, Wisconsin. She chairs the firm's school law section and advises school districts on legal matters involving student issues, among other things. 1088

Starting Saturday night, Tropical Cyclone Douglas will approach the State of Hawaii from the east. Increasing chances of heavy rain and strong winds could affect portions of the state beginning Sunday. It is too early to tell which islands will be impacted by #Douglas. pic.twitter.com/F8UXnpAZ7a— National Weather Service (@NWS) July 23, 2020 351

TAMPA, Fla. — Air conditioning units may be contributing to the spread of COVID-19, especially in the southern part of the United States, according to a Harvard epidemiologist.Dr. Edward Nardell is a professor in the Departments of Environmental Health and Immunology and Infectious Diseases at the Harvard T.H. Chan School of Public Health. He's done in-depth research on how air conditioning units contribute to the spread of airborne infections.Nardell said air conditioning can help airborne viruses spread in three ways.First, people go inside to cool down, when you are much safer outdoors, Nardell said. Now, we're seeing more people indoors because of the high heat and humidity, specifically in the southern states like Florida.The second problem is that air conditioning brings in very little outside air, according to Nardell. While this isn't a major problem inside your own home, it can be especially problematic in corporate settings."It just isn't economically possible to bring in outside air, recirculate it and dehumidify it," he said.Lastly, he said when people are indoors, you're often not spaced out safely as you would be outdoors."You are not socially distanced as much, but you're re-breathing the same air that someone else just exhaled," Nardell said. "We call it rebreathed air fraction, and if someone is infectious, often asymptomatic, you're going to be rebreathing their small particles."Nardell also said air conditioning units can generate air currents that can carry large particles even further, similar to what researchers found contributed to the spread of the novel coronavirus disease in an air-conditioned restaurant in Guangzhou, China, involving three family clusters.On the Department of Homeland Security's website, this tool can be used to estimate how long the virus would be expected to remain stable while airborne.Now, the Centers for Disease Control and Prevention is recommending restaurants increasing the distance between tables and improving ventilation.The use of germicidal lamps, a technology that Nardell said is almost 100 years old, has been proven effective in protecting against tuberculosis infection and is already in use in some settings to fight COVID-19.The lamps are set up to shine horizontally, high in the room where sterilization is needed. Air currents, stirred in part by warmth from human bodies, circulate up to the ceiling, where the ultraviolet light kills floating pathogens, and then back down again.This technology, Nardell said, is not only proven, but it can also be deployed cheaply and easily in a number of settings as society reopens.This story was originally published by Lauren Rozyla at WFTS. 2691

Synthetic cannabinoids — often called Spice, K2 or fake weed — have been tied to 38 cases of severe bleeding, including one death, across Chicago and areas in central Illinois.All of those cases required hospitalization related to coughing up blood, blood in the urine, bloody nose, bleeding gums and other symptoms. Three cases tested positive for brodifacoum, or rat poison, according to a statement from the Illinois Department of Public Health on Saturday.Now, state officials are working to identify any common synthetic cannabinoid products related to those cases and to determine where the products were obtained.There are still many questions about the outbreak that need answers."This is the first time we've seen an outbreak of this magnitude in the area," Melaney Arnold, a spokeswoman for the Illinois Department of Public Health, said Monday."We're working with numerous different partners across the city and state as we investigate this outbreak," she said.Synthetic cannabinoids are sold in convenience stores, gas stations, drug paraphernalia shops, novelty stores and even online.Health officials warn that anyone who has a reaction to synthetic cannabinoids immediately should call 911 or be taken to an emergency department. 1267