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Boeing unveiled an overhaul Wednesday to a software system and the pilot training of its signature 737 MAX plane, marking its most direct attempt to fix an element of the plane's original design that investigators believe led to two recent crashes.At the company's plant in Renton, Washington, where the plane is assembled, Boeing pilots ran through scenarios on a flight simulator that was transmitted live into a conference room where regulators and some 200 pilots from client airlines were gathered, according to Mike Sinnett, Boeing's vice president for product strategy. The guests were able to request test simulations."We're working with customers and regulators around the world to restore faith in our industry and also to reaffirm our commitment to safety and to earning the trust of the flying public," Sinnett said. "The rigor and thoroughness in the design and testing that went into the MAX gives us complete confidence that the changes we're making will address any of these accidents."The gathering came at a 1038

An explosion rocked a chemical plant early Wednesday in Texas, causing extensive damage across the small city of Port Neches and leaving at least three employees injured.A chemical fire continues to burn at the site, and a mandatory evacuation order has been issued within a half mile of the TPC Group plant, about 90 miles east of Houston, the Nederland Volunteer Fire Department said."There's extensive damage throughout the City," Port Neches Police Department said in a statement. "Please stay off the roads anywhere near the refineries. Obey all the barricades that are in place. We are doing everything we can to keep everyone safe and informed."Personnel have been evacuated from the plant, which makes products for chemical and petroleum companies, said TPC Group, which runs the Port Neches Operations site. About 13,000 people live in Port Neches, and some said their home windows were blown out by the blast. The fire is burning a chemical called butadiene, police said. A colorless gas, butadiene is considered a health hazard, according to the US National Library of Medicine. It is made from processing petroleum and is used to make synthetic rubber and plastics."Our focus is on protecting the safety of responders and the public, and minimizing any impact to the environment," TPC Group said.The injured employees are undergoing treatment, the company said.'Then I noticed an orange glow'Tyler Shawn Dunlap was sleeping when the explosion rocked his house."I heard and felt my house shake. I first thought people were coming to break in 'cause of our intense security," he told CNN. "I went to Dad's room, and he thought our generator blew up, so we checked that, then I noticed an orange glow from the clouds."Trent Lee said the explosion sounded like a nuke and shook everything in Port Neches. The blast was also captured on Mia Hubert's 1869

CALABASAS, Calif. – The National Transportation Safety Board (NTSB) released its preliminary report Friday over the helicopter crash that killed Kobe Bryant, his 13-year-old daughter and seven others on Jan. 26. Preliminary report on the Jan. 26, 2020, crash of a Sikorsky S76B helicopter, Calabasas, CA; 317

BAKERSFIELD, Calif. — The creator of a viral Facebook event that jokingly calls for participants to "storm Area 51" says he was 140

Another blast of severe weather will start Wednesday in the central and southern United States as some areas are still recovering from last week's deadly storm.The storms will barrel into the East Coast by Friday, unleashing tornadoes, damaging winds and hail along the way, from the Texas Panhandle to the coast of the Carolinas.Over three days, the storm will affect 91 million people and unfold across about 1,400 miles, including parts of the Southeast and Mid-Atlantic that got battered over the weekend by severe storms.As the system treks east, parts of the Southeast could experience severe weather Thursday, with a large swath of the East Coast on track to feel impacts on Friday."The greatest threat will be damaging winds and very large hail, but tornadoes will also be possible," the National Weather Service said.A massive storm system killed eight people in the South over the weekend and caused damage from Texas to Mississippi. Four people died in Texas, two in Louisiana, one in Mississippi and another in Alabama.Wednesday: From Texas to Kansas Storms will begin Wednesday in the middle of the country, with the most significant threat stretching from central-southeastern Texas to southern Kansas.Large hail and isolated tornadoes are concerns for places including Dallas and Austin, Texas, and Oklahoma City.Those areas already face an "enhanced risk" of severe thunderstorms -- the third of five risk levels -- according to the National Weather Service's Storm Prediction Center.The storms, expected to organize Wednesday afternoon across the southern Plains, will become more widespread in the evening and into the night.The biggest concern is the potential for large hail, possibly 2 inches or more in diameter. Strong winds are also possible, along with the risk of a few tornadoes.Beyond the "enhanced risk" zone, a "slight risk" (Level 2 of 5) of severe storms extends from the Mexico-Texas border to Iowa. That includes densely populated areas around San Antonio; Tulsa, Oklahoma, Kansas City; Wichita, Kansas; and Shreveport, Louisiana.Thursday: From Louisiana to TennesseeAs the system pushes east, the severe weather threat will persist.Louisiana and Mississippi will be at risk Thursday morning, with the storms moving on Thursday afternoon through the evening into Alabama and Georgia. The Deep South faces a "slight risk" (Level 2 of 5) of severe storms, the Storm Prediction Center said.Cities at risk include Baton Rouge and New Orleans, Louisiana; Mobile, Birmingham and Montgomery, Alabama; and Memphis and Nashville, Tennessee.The storms are expected to continue through the night, with the potential for damaging winds and possibly a tornado.Friday: From Florida to Washington.By Friday morning, the storms will near coastal Atlantic states, bringing the potential for severe weather from Florida to Washington.The risk there will be partially dampened by the intense rainfall associated with the broad system, but conditions should still allow for a few individual storms to intensify.The threat should diminish throughout the overnight hours as the cold front associated with the potent storms finally pushes off shore. 3173

来源：资阳报