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Three explosions that occurred when people picked up packages outside their residences appear to be connected, Austin, Texas, city Police Chief Brian Manley said Monday at a news conference.A Monday morning explosion killed a 17-year-old African-American boy and also injured a woman at the house. A second Monday explosion left a 75-year-old woman in critical condition, the chief said. A March 2 blast killed a 39-year-old African-American man.All the explosions occurred when people who lived at the residences went outside and picked up packages, Manley said. The packages were not delivered by the postal service or delivery services like UPS or FedEx, he said."The evidence makes us believe these incidents are related," he said, saying investigators have not come up with a motive or whether anybody has claimed responsibility. It's not known if the victims knew each other or if they were targeted, he said.Police also have not decided if these are hate crimes, but said that's a real possibility of the victims' races."We're not ruling anything out at this point," he said. "We're willing to investigate any avenue."Authorities have only identified one victim. Anthony Stephan House, 39, died from injuries in the March 2 explosion, police said. The elderly woman injured today sustained life-threatening injuries, the chief said.In describing the Monday morning blast that killed the teenager, the chief said: "What we understand at this point is that early this morning is that one of the residents went out front and there was a package on the front doorstep. They brought that package inside the residence and as they opened that package, both victims were in the kitchen, and the package exploded, causing the injuries that resulted in the young man's death and the injuries to the adult female."The female's injuries were not life-threatening, he said.Manley strongly urged residents to be on the lookout for suspicious packages and to alert authorities immediately."If you've received a package that has been left on your doorstep or left in your yard or left on your driveway that you were not expecting or that was not from someone you know, then give us a call," Manley said.Likewise, he urged the thousands of visitors in town -- many at the South by Southwest Interactive Festival -- to be cautious. "Enjoy yourself, have a good time," he said. "But be aware, be suspicious."The festival began Friday in downtown Austin and ends Tuesday. The explosions are not in the immediate vicinity of the festival.Texas Attorney General Ken Paxton urged all Texans to be cautious. "With three reported explosions in the Austin area, I want to urge all Texans to report any suspicious or unexpected packages arriving by mail to local law enforcement authorities. Call 911 immediately if you receive something suspicious," he said on Twitter.Local police, as well as agencies including the FBI, and the Bureau of Alcohol, Tobacco, Firearms and Explosives, are working on the case.The ATF is processing evidence from the first device at its lab and evidence from the second device will also be sent to an ATF lab for consistency.Governor Greg Abbott announced a ,000 reward was being offered for information leading to the identification and arrest of the person or persons involved in the deadly package blasts. 3330

Though President Donald Trump remains hospitalized with a COVID-19 infection, it didn't stop him Monday morning from sending more than a dozen tweets — most of them in all caps — urging his supporters to vote for him on Election Day.Between 6:30 a.m. ET and 7:30 a.m. ET on Monday morning, Trump tweeted at least 17 times — most of which were completely in capital letters and included a policy position or administration goal followed by the call to "VOTE!"It was the most active the president has been on Twitter since his hospitalization on Friday. Typically a prolific user of Twitter, Trump has tweeted 14 times since he confirmed his COVID-19 diagnosis on Friday, many of those coming as retweets.Trump's tweetstorm comes as the nation is still mostly in the dark regarding his condition. Throughout the weekend, the president's doctors painted a relatively rosy picture regarding Trump's bout with the disease. However, his doctors declined to share when Trump's last negative test was, how high his fever reached and other important vitals. His doctors also reported Sunday multiple instances in which Trump's blood oxygen levels dropped significantly — something that was not mentioned the day before. The doctors' reports also contradict Saturday comments from White House Chief of Staff Mark Meadows, who called the president's condition on Friday "very concerning" and added that Sunday and Monday would be "critical" in his fight against the virus.Through several photos and videos released by the White House, Trump has attempted to maintain the appearance of wellness. Despite his infection with a highly contagious disease, Trump left the hospital briefly on Sunday for a ride in a Secret Service vehicle in front of the hospital to wave to his supporters. 1780

Transportation officials are warning of what they call a "death spiral" if public transit does not get the federal funding it needs to stay afloat.Ridership has fallen by 90 percent since the pandemic as departments find themselves strapped for cash.“Without transit, there is no economic recovery,” said Corinne Kisner, executive director of the National Association of Transportation Officials (NACTO).The American Public Transportation Association estimates 36 million Americans relied on public transportation in 2019, with about 36 percent of that servicing essential workers, according to the advocacy group TransitCenter.“The reality is that transit agencies are in an existential crisis,” said Kisner.Once ridership dropped across the country, public transportation departments saw their revenues plummet. Beth Osborne with Transportation for America, a public advocacy group, says aside from ride fares most transit money comes from sales tax, which also took a hit when the economy shut down.“It really does have tentacles that affect so much of our economy, of our health, of recovery and getting through this,” said Osborne.In San Francisco, the revenue drop has led to Bay Area Rapid Transit dropping more than 50 percent of its service. The story is similar for most major city transit systems.“We’re really limping along and hoping Congress will approve more funding for us,” said Jim Allison, spokesman for BART. “We’re doing what we can to try and get essential workers to and from where they need to go, but beyond that, it’s not much of a service compared to what we used to provide.”The billion in CARES Act funding alleviated some woes early on, but officials estimate billion more is needed to make it through the end of the year, and right now, no package is in place.If departments don’t find an answer, NACTO says 30,000 jobs could be lost because of stalled capital improvement projects.A lacking service could also mean a life or death scenario for more than just transit departments.“We need people to get tested,” said Osborne. “In many places, they have said they will not test anyone who does not arrive in a car. Well, there are a lot of people who don’t have one.” 2213

Three NBA teams — Atlanta Hawks, Utah Jazz, and Memphis Grizzlies — have announced that they would allow a limited number of fans at games during the 2020-21 season amid the coronavirus pandemic.Last season, teams played in a bubble setting in Orlando, Florida. This season, teams will be traveling from city to city once again.Earlier in November, the Oklahoma City Thunder announced they would have a limited number of fans at the beginning of its season, but on Monday, the team changed course and decided to not allow fans at games due to rising COVID cases in the state."For months, we have worked in close collaboration with Chesapeake Energy Arena, the City of Oklahoma City, local health officials, and the NBA to put into place thorough health and safety measures to allow for reduced seating capacity," the team said in a press release. "However, as we review ongoing and concerning trends in COVID-19 cases and hospitalizations in Oklahoma, we want to exercise an abundance of caution to help control the spread of the virus in our community. Therefore, the Thunder has made the decision to begin the season without fans in the arena."The Utah Jazz announced that they would allow a limited number of fans at their home games. According to KSTU, Vivint Arena will allow 1,500 fans in the suites and lower bowl. Fans must wear face coverings and social distance while inside the arena.KSTU reported that the arena would reduce capacity in elevators, retail stores, and restrooms.Another NBA team that's allowing fans this season will be the Atlanta Hawks. According to the Atlanta Journal-Constitution, a small number of friends and family will attend the first few home games at State Farm Arena. Approximately 1,500 fans will be able to watch the Hawks game on Martin Luther King Jr. Day.And according to the Memphis Grizzlies, the seating capacity at the FedExForum will be at about 20% capacity. The Grizzlies said that everyone inside the arena would need to wear a mask at all times, and everyone will need to social distance. The team also announced that they would install more than 300 hand sanitizing stations would be placed throughout the arena for easy and ample access for guests.The 2020-21 season is set to tipoff Dec. 22, with teams playing 72 games. And last week, the league announced the structuring and format of how games were to be played during the coronavirus pandemic.In a press release, the league said that the regular-season would be released in two segments: the first half schedule will be released around the start of training camp, which is reportedly beginning the first week of December. The league will release the second-half portion towards the end of the first half of the season.Other notable changes occurring this season, per a press release by the league:Each team will play three games against each intraconference opponent, with each pairing featuring either two home games and one road game or one home game and two road games. Within each team's division, the league office has randomly assigned which two opponents will be played twice at home and which two opponents will be played twice on the road.A play-in tournament will determine the seventh and eighth playoff seeds.All five teams from within a division will play all five teams from one other intraconference division twice at home, and all five teams from the remaining intraconference division twice on the road.Each team will play two games against each interconference opponent (30 total games per unit), with each pairing featuring one home game and one road game.The NBA also released this tentative calendar of important dates for the upcoming season:Dec. 11-19, 2020: Preseason gamesDec. 22, 2020 – March 4, 2021: First Half of regular seasonMarch 5-10, 2021: All-Star breakMarch 11 – May 16, 2021: Second Half of regular seasonMay 18-21, 2021: Play-In TournamentMay 22 – July 22, 2021: 2021 NBA Playoffs 3937

Their youthful brains were developing normally, with no signs of developmental, psychological or neurological problems. None had ever had a concussion. But by the end of a single football season, 24 children between the ages of 9 and 18 who had more frequent impacts to the head showed signs of damage to brain development, new research says."Repetitive head impact exposure may have a cumulative effect in the rapidly developing brains of youth and high school football players," said study co-author Gowtham Krishnan Murugesan, a radiology research assistant at UT Southwestern Medical Center in Dallas, adding that the results mirror other recent findings.The study outfitted 60 youth and high school football players who had no history of head trauma or developmental issues with a head impact telemetry system that measures the magnitude, location and direction of impacts to the head. The researchers were not looking at whether the impact resulted in a concussion, only that impact occurred.The children were sorted into two categories: high cumulative head impact players (24) and low cumulative head impact players (36).Before beginning to play, each child had a resting state functional scan, known as an fMRI; the scans were repeated at the end of football season. The researchers were trying to see how exposure to repetitive hits affects the normal "pruning" process in the brain that occurs during adolescence."Pruning is an essential part of brain development," Murugesan said, comparing the process to how a tree needs to have dead or unneeded branches cut to keep it healthy and allow it to grow."Disruption in normal pruning has been shown to be related to weaker connections between different parts of the brain," he said.After comparing the functional MRI results to the player's level of impact, the researchers found that youth in the high-impact group had damage to their brains' pruning process after one season."Our study has found a significant decrease in gray matter pruning in the frontal default mode network, which is involved in higher cognitive functions, such as the planning and controlling of social behaviors, " Murugesan said.Although the "teenage years are a critical time for brain development, brain remodeling or synaptic pruning, this was a short-term study and did not follow the players longitudinally over several years. We don't really know the full application," said Dr. Julian Bailes, director of neurosurgery and co-director of the NorthShore University HealthSystem Neurological Institute, who was not involved in the research.Weill Cornell neurologist Dr. Richard Isaacson, who was also not involved in the study, called the research "early" and said the results don't necessarily "translate to a clinical or cognitive outcome." More research is needed to see whether the decline in brain pruning permanently affected the child's cognitive function or whether the brain's natural plasticity allowed it to repair itself."I would call this a pilot study," Isaacson said. "The call to action would be that we need more robust longitudinal studies with a pre- and a post-assessment of more than brain imaging. The study should also measure cognitive and neurological function and look for changes."As we learn more about the issue, Isaacson said, parents should do everything they can to limit contact in sports, "especially in practice before games, where studies show the majority of contact occurs." 3464

来源：资阳报