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An agency in Colorado that tracks avalanches hiked its danger level to "extreme" for a swath of the state, the highest level on its scale."Do not travel in the backcountry," the Colorado Avalanche Information Center said in a tweet Thursday. "Historic avalanches expected to valley floors."The extreme dangers are for Vail and Summit County, and the Sawatch, Gunnison and Aspen zones.Colorado has been with heavy snow and avalanches. Two deaths occurred there recently and an avalanche shut down a part of Interstate 70 and ruptured a natural gas pipeline.Spencer Logan, an avalanche forecaster with the Colorado Avalanche Information Center, said avalanches are "running bigger than the last 20 to 30 years" and in some cases bigger than the last 50 years. He expects avalanche dangers will be high through the weekend.He said the large amounts of snow that have fallen in short amounts of time have pushed slopes "closer and closer to the edge.""We're seeing more snow than we have for quite a few years."Logan said the forecasts are for areas outside town limits and the backcountry, and roads will be affected."Certainly these avalanches are having an impact on the highways," he said.The Colorado Department of Transportation will do what it can to reduce avalanche hazards and ski patrols will be on alert."Travel in, near, or below avalanche terrain is not recommended. Keep it simple and just AVOID the backcountry," the Friends of CAIC said on Twitter. 1473

A retired psychologist who was one of two private contractors who designed a brutal CIA torture program following the Sept. 11 attacks is testifying about it in court for the first time. James Mitchell was called Tuesday as a defense witness in military proceedings at the U.S. base at Guantanamo Bay, Cuba, against five men charged for their alleged roles in the 9/11 plot.Defense lawyers hope Mitchell's testimony about interrogations that many believe amounted to torture will help disqualify statements the defendants made to the FBI. Those statements are key evidence in their war crimes trial scheduled to start next year. 641

A team of St. Lucie County firefighters went above and beyond to help an elderly man in need.According to the St. Lucie County Fire District, Lt. John King, Justin Harnage, and Jeremy Rouse responded to a home on in Fort Pierce, Florida, on Tuesday after an 86-year-old man fell and was unable to get up.Officials said the elderly man has trouble walking and needed help getting into his wheelchair, which was located outside on the patio.Noticing that the home didn't have a proper wheelchair ramp, the three firefighters went back to their fire station, built a wheelchair ramp out of plywood, then took it back to the elderly man's home and installed it at his front door."Acts like these, which are above and beyond the call of duty, reinforce the Fire District motto: 'Our Family Serving Yours.'" said Division Chief Aaron Shaw. 845

Airbnb is offering a handful of people concerned about the environment a chance to participate in scientific research on how to help preserve it during an all-expense paid trip to Antarctica. 203

Alaska Airlines is dropping its sponsorship of the Iditarod Trail Sled Dog Race after this year's race. The company says in a statement that it has been part of the Iditarod for over 40 years but the company is transitioning to a new corporate giving strategy. The race's biggest critic is People for the Ethical Treatment of Animals and the group praised the airline's decision. PETA has pressured race sponsors and held protests outside Alaska Airlines' Seattle corporate offices. Alaska Airlines says PETA did not play a role in its decision. This year's Iditarod has its ceremonial start Saturday in Anchorage, with the competitive start the next day. 668

来源：资阳报