广西运动终板模型(山东龋齿分类模型) (今日更新中)

Schools in the greater Denver area will be closed Wednesday as authorities search for a woman whom they described as armed and "infatuated" with the Columbine mass shooting days before the 20th anniversary of the attack.Local, state and federal officials are searching for Sol Pais, 18. She made "credible" -- but unspecific -- threats after traveling from Miami to Denver on Monday night, and is considered dangerous, said Dean Phillips, the special agent in charge of the local FBI office.After she arrived, she immediately went to a store and bought a pump action shotgun and ammunition, the FBI said Tuesday night.Pais is considered a threat to the community and schools, but there is no information on any specific threat to a particular location, Phillips said.Nearly 20 school districts will be closedNearly 20 school districts in the greater Denver area will be closed Wednesday due to security concerns just days ahead of the 20th anniversary of the Columbine High School shooting.They include the Douglas County School District , Aurora Public Schools, Jefferson County Public Schools and Cherry Creek Schools. Columbine High School is in Jefferson County."There are many people that work diligently day in and day out ... that are making the very best decisions they can for the sake of the kids who are in schools each and every day," said Jefferson County Sheriff Jeff Shrader. "We want our schools to be a safe place for kids to learn."The Colorado Department of Education recommended that Denver area schools conduct lockouts and controlled release Tuesday after the alleged threats.In a lockout, exterior doors are locked, and school continues as normal.Columbine High and several schools in the area were part of the lockout, the Jefferson County Sheriff's Office tweeted.She was last seen wearing camouflage pantsAfter Pais arrived in the state Monday and purchased a pump action shotgun and ammunition, she went to the foothills, where she was last seen, Phillips said."Her comments, her actions that we have heard about from others tend to cause us great concern that she may pose a threat to a school," he added.Officials released an image of Pais. She is about 5-foot-5 and was last seen wearing a black T-shirt, camouflage pants and black boots, authorities said.Authorities said they are being especially cautious because Pais' statements don't express a specific plan and were mostly spoken."She did make statements that were threatening to schools and she did purchase a firearm ... and that's why she's a credible threat," said Patricia Billinger, a spokeswoman with the Colorado Department of Public Safety.Anniversary of Columbine shooting is this weekThe 20th anniversary of the shooting at Columbine High School is days away.On April 20, 1999, two students killed 12 of their schoolmates and one teacher in a mass shooting at the high school in the town of Littleton -- about 10 miles from Denver."I know that this opens a wound, especially on an anniversary week, for those families who were most deeply impacted by this," Shrader said.At this point, there might not be enough probable cause to arrest Pais, but the federal and state attorneys' offices are working to develop appropriate charges, Phillips said. He said once they detain her, they will hold her for as long as they legally can.Authorities are asking for the public's help finding her, and tips can be sent to the tip line at (303) 630-6227 or emailed to denverfbitips@fbi.gov. 3486

Serena Williams moved into a 10th US Open final and picked up a record-equaling 101st win in New York by routing Elina Svitolina 6-3, 6-1 but the number she might still be preoccupied with is 24.Collecting a 24th major Saturday would tie the American with Margaret Court for tennis' all-time lead, and the 37-year-old is hoping to get over the finish line after losing three grand slam finals in a row -- which had never previously happened in her storied three-decade career.The latest setback occurred at Wimbledon in July, when Williams was stopped thanks largely to the brilliance of Simona Halep. The Romanian committed a miniscule three unforced errors in the final.Svitolina is a similar type of counterpuncher, but the fifth seed from Ukraine paid the price for not capitalizing on her early opportunities under the lights of Arthur Ashe stadium.The Wimbledon semifinalist earned three break points straight away, didn't convert, then was broken from 40-0 to trail 2-0. Those first two games took an extended 15 minutes.There was more woe for Svitolina and her player box -- which included her boyfriend, Gael Monfils, who lost in the quarterfinals Wednesday -- when she couldn't break from 40-0 on the Williams serve at 3-1.That really was her last chance to gain a foothold. Not long after, Williams booked a spot in the final almost exactly 20 years after appearing in her first grand slam final at the 1999 US Open. That gap is a record -- another record she owns.Svitolina won the last time they faced off, though Williams was suffering from a shoulder injury back then at the Rio Olympics in 2016.Williams tied Chris Evert for top spot in US Open victories. She has spent an economical one hour, 54 minutes combined on court in her last two matches, crushing China's Wang Qiang in the quarterfinals and surrendering only one set en route to the final.Williams moving greatPutting a knee injury behind her, Williams moved supremely well at the Rogers Cup in Toronto in August and looks to have overcome the back injury that forced her to retire in that final against Bianca Andreescu as well as the rolled ankle she sustained this week against Petra Martic.She patrolled the court sublimely to bring up a break point at 1-1 in the second and even, rarely for her, served and volleyed.Williams could face the 19-year-old Canadian upstart again if Andreescu tops Belinda Bencic in the second semifinal. Andreescu or Bencic will be appearing in a first grand slam final.It's all going so well for Williams but the question indeed is whether she can produce in the final and win a major for the first time since becoming a mom to daughter Olympia almost exactly two years ago.Williams was once unbeatable in grand slam finals, winning eight straight from 2012-2015.But twelve months ago, she controversially fell to Naomi Osaka at Flushing Meadows.Though they lack in experience, the crafty pair of Bencic or Andreescu shouldn't be taken lightly.No one has tallied more top-five or top-10 wins this season than former teen prodigy Bencic -- who beat Williams in 2015 and Osaka this week -- while 15th-seed Andreescu has won 12 straight matches, and 22 if you discount a retirement loss to Anett Kontaveit in Miami in March. 3244

Scientists have long warned of the effects of global warming and the possibility of more intense wildfires that burn for longer periods of time. Now, a new team of researchers is hoping to get a better understanding of how the smoke travels and what the tiniest particles could be doing to our lungs. "There's many things we’re still struggling to understand about smoke,” explains Joshua Schwarz, a physicist with the National Oceanic and Atmospheric Administration (NOAA). The group of researchers includes meteorologists and weather modelers, in addition to scientists. “All together, we are deciding which fires to target," Schwarz says. Amber Soja, with NASA, describes herself as the “fire person” of the group. Every day for the next couple of weeks, this group will create a flight plan, opening the door for another group of scientists inside this flying laboratory. “We've got tremendous range, and we're carrying a tremendous payload of information,” Soja says.This lab was once an Italian passenger airliner. It flies straight into the smoke of fires. "We'll have to look at what's the altitude of the smoke we want to be in, which direction is the smoke going, how far can we track that smoke," Schwarz says.Intake tubes on the outside of the lab bring in smoke particles that will be studied. Researchers are interested in learning how the smoke travels and what it does to our bodies when it’s inhaled. Pete Lahm, with the U.S. Forest Service, says studying the smoke is important because it impacts both public health and safety. “This info will help us make in the long run [make] better decisions on when we ignite fire and how we consider smoke impacts, and that's absolutely critical to our mission,” Lahm says. Watch the video above to learn more. 1787

RIVIERA BEACH, Florida — The FBI said a 59-year-old U.S. Army veteran shot and wounded a doctor Wednesday evening just before a mental health evaluation at the Veterans Affairs Medical Center in Riviera Beach.The shooting happened at approximately 6:20 p.m. local time at the hospital.According to the FBI, 59-year-old double-amputee Larry Ray Bon pulled out a small handgun and opened fire inside the emergency area, striking at least two people.One person was grazed by the bullet, and a doctor was shot in the neck while trying to subdue the shooter. "In between shots, the doctor saw an opportunity to jump on the subject and disarm him. While doing so, he sustained a gunshot wound to his neck, so pretty heroic," said FBI Special Agent Justin Fleck.The doctor, whose name has not been released, was transported to St. Mary's Medical Center. The doctor was treated and later released.The shooter, who officials said is originally from Michigan, has been recently living in the West Palm Beach area. Officials believe Bon may be homeless. The FBI said Bon served in the U.S. Army for a very short period of time, but this incident is not believed to be combat-related. The FBI did not release any information concerning the security measures of the hospital. "He has a criminal history and has had frequent contacts with local police departments," said Fleck.The hospital will remain operational for scheduled appointments and procedures on Thursday.Riviera Beach Police assisted the VA police force. The VA Office of the Inspector General is also helping with the investigation. 1597

Sean Wilcox has been living in transitional housing for three months.“It’s a place to get me back on track… get me off the streets,” Wilcox said.He’s a part of a program that connects people experiencing homelessness with solutions that best fit their unique situation, like working a job or taking classes.Wilcox says he’s ready for a change in his life after spending six years on and off the streets.“It’s a rough life. Especially when you’re on drugs,” Wilcox said.He had lost all hope. Wilcox said he tried to take his life multiple times. But now, he’s working to build a better life for himself.“I never thought five, ten years ago, that I would have been homeless.”According to a 700

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