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发布时间: 2025-05-31 23:21:15北京青年报社官方账号
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WASHINGTON (AP) — For much of the United States, invasive grass species are making wildfires more frequent, especially in fire-prone California, a new study finds.Twelve non-native species act as "little arsonist grasses," said study co-author Bethany Bradley, a University of Massachusetts professor of environmental conservation.Wherever the common Mediterranean grass invades, including California's southern desert, fires flare up three times more often. And cheatgrass , which covers about one-third of the Intermountain West, is a big-time fire promoter, Bradley said."I would not be surprised at all if invasive grasses are playing a role in the current fires but I don't think we can attribute to them directly," Bradley said.University of Utah fire expert Phil Dennison, who wasn't part of the study but says it makes sense, said, "In a lot of ways, California was ground zero for invasive grasses. Much of California's native perennial grassland was replaced by Mediterranean annual grasses over a century ago. This study doesn't look at invasive grasses in the areas that are burning in California, but invasive grasses are contributing to the fires there."Experts say the areas burning now in California are more shrubs and grasses than forests, despite what President Donald Trump tweeted over the weekend."This is a global problem," said University of Alberta fire expert Mike Flannigan, who wasn't part of the study but said it makes sense. "I think with climate change and human assistance we are moving to a grass world. One region they should have mentioned is Hawaii where wildfires are increasing in large part due to invasive grasses."Invasive species are spreading more because of climate change as warmer weather moves into new areas, said study lead author Emily Fusco, also of the University of Massachusetts. New England and the Mid-Atlantic are seeing new invasive and more flammable grasses, Bradley said.The study in Monday's journal Proceedings of the National Academy of Sciences looks at the connections between a dozen species of invasive grasses and fires nationwide, finding fires occur more often in places with the non-native grasses. But the study did not find a link between invasive grasses and the size of the fires.Four of these species, including cheatgrass and common Mediterranean grass, are in California. These grasses get dry and then watch out, Fusco said."When you start a fire normally you want kindling," Fusco said. "The grasses are, more or less, like kindling"If someone lights a match and throws in the middle of a forest, it is unlikely a fire will start, but throw it in a field of cheatgrass "and odds are that it's going to catch," Bradley said."We are the reason that invasive species are here. We are the reason that they get spread around," Bradley said.Flanagan noted that invasive plants that are not grasses also feed the wildfire problem.While most outside experts said the study was important, wildfire expert LeRoy Westerling at the University of California, Merced said that with wildfires the size is key so this study is less valuable because it measures frequency.While size matters in forest fires, study author Bradley said mid to small size fires are the ones "in everybody's backyard" and affect people and their buildings more. 3313

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WASHINGTON (AP) — It's not just audiotapes.Omarosa Manigault Newman has a stash of video, emails, text messages and other documentation supporting the claims in her tell-all book about her time in the Trump White House, a person with direct knowledge of the records told The Associated Press Friday.Manigault Newman has made clear that she plans to continue selectively releasing the pieces of evidence if President Donald Trump and his associates continue to attack her credibility and challenge the claims in her book, "Unhinged." She's already dribbled out audio recordings of conversations, and video clips, texts or email could follow, according to the person who described what Manigault Newman has called a multimedia "treasure trove." The person was not authorized to discuss the issue publicly and asked for anonymity.RELATED: Omarosa releases recording of Lara Trump offering campaign gig"I will not be silenced. I will not be intimidated. I'm not going to be bullied by Donald Trump," the former Trump aide told The Associated Press this week as she seemed to dismiss a threat from Trump's campaign. She spoke to the AP hours after Trump's campaign announced it was filing an arbitration action against her alleging she'd violated a signed agreement with the campaign that prohibits her from disclosing confidential information.She told PBS in a separate interview this week: "I have a significant amount, in fact, a treasure trove, of multimedia backup for everything that's not only in "Unhinged," but everything that I assert about Donald Trump."RELATED: Listen: Omarosa taped call with Trump after she was firedManigault Newman claims Trump officials offered her a job on the campaign as a way of silencing her, after she was fired from the White House. She's accused Trump of being racist and suffering from a mental decline.The White House has countered by branding Manigault Newman as a disgruntled former staffer with credibility issues who is now trying to profit from a book based on false attacks against an individual she has called a mentor and has admired for more than a decade.Trump has also lashed out at Manigault Newman, calling her a "lowlife," ''wacky and deranged" and a "dog."RELATED: Trump calls Omarosa a 'dog' in latest attack on ex-aideSimon & Schuster this week also dismissed threatened legal action from Trump's campaign. A campaign attorney told Simon & Schuster in a letter that "Unhinged" violated Manigault Newman's confidentiality agreement, but the publisher responded that it was acting "well within" its rights."Unhinged" has spent the past few days at No. 2 on Amazon.com's best-seller list, trailing only Rachel Hollis' lifestyle book "Girl, Wash Your Face."Manigault Newman was director of communications for a White House office that networks with various constituency groups until she was fired last December by chief of staff John Kelly, citing "significant integrity issues." Before joining the administration, Manigault Newman handled African-American outreach for Trump's presidential campaign. She has known Trump since 2003, when she became a contestant on Trump's TV show, "The Apprentice."RELATED: Trump campaign suing Omarosa for violating non-disclosure agreementShe has already released several secret audio recordings, including of the meeting in which she was fired by Kelly.In another recording, Trump's daughter-in-law, Lara Trump, is heard offering Manigault Newman ,000 a month - after she was fired from the White House - for a campaign job requiring her to be "positive." Lara Trump is a senior adviser on Trump's re-election campaign.Manigault Newman also alleges that tape exists of Trump using a racial slur while working on "The Apprentice." Trump has denied this, saying on Twitter that "I don't have that word in my vocabulary, and never have. She made it up."___AP National Writer Hillel Italie in New York contributed to this report. 3938

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WASHINGTON (AP) -- An aide to a firearms-toting congresswoman-elect says she has already asked Capitol Police about carrying her weapon on Capitol grounds once she's sworn into office.The practice is allowed for members of Congress under decades-old congressional regulations.Republican Rep.-elect Lauren Boebert of Colorado is a conservative guns-rights advocate who made the inquiry recently.One of her future colleagues says other members of Congress already carry firearms.The public is barred from carrying guns in the Capitol and its grounds.Boebert's office declined to make her available for an interview with The Associated Press.An aide says her conversation with the Capitol Police was an inquiry about the rules. 732

  

WASHINGTON — Joe Biden has said during a virtual town hall that President Donald Trump was the country's “first” racist president. The presumptive Democratic presidential nominee’s comment came Wednesday in response to a questioner mentioning the president referring to the coronavirus as the “China virus." "We’ve had racists, and they’ve existed. They’ve tried to get elected president. He’s the first one that has,” Biden said. However, many presidents — including the nation’s first, George Washington — owned slaves. Trump responded by saying that he'd done more for Black Americans than any other president, with the possible exception of Abraham Lincoln. 669

  

WASHINGTON (AP) — Behind America's late leap into orbit and triumphant small step on the moon was the agile mind and guts-of-steel of Chris Kraft, making split-second decisions that propelled the nation to once unimaginable heights.Kraft, the creator and longtime leader of NASA's Mission Control, died Monday in Houston, just two days after the 50th anniversary of what was his and NASA's crowning achievement: Apollo 11's moon landing. He was 95.Christopher Columbus Kraft Jr. never flew in space, but "held the success or failure of American human spaceflight in his hands," Neil Armstrong, the first man-on-the-moon, told The Associated Press in 2011.Kraft founded Mission Control and created the job of flight director — later comparing it to an orchestra conductor — and established how flights would be run as the space race between the U.S. and Soviets heated up. The legendary engineer served as flight director for all of the one-man Mercury flights and seven of the two-man Gemini flights, helped design the Apollo missions that took 12 Americans to the moon from 1969 to 1972 and later served as director of the Johnson Space Center until 1982, overseeing the beginning of the era of the space shuttle.Armstrong once called him "the man who was the 'Control' in Mission Control.""From the moment the mission starts until the moment the crew is safe on board a recovery ship, I'm in charge," Kraft wrote in his 2002 book "Flight: My Life in Mission Control.""No one can overrule me. ... They can fire me after it's over. But while the mission is under way, I'm Flight. And Flight is God."NASA Administrator Jim Bridenstine Monday called Kraft "a national treasure," saying "We stand on his shoulders as we reach deeper into the solar system, and he will always be with us on those journeys."Kraft became known as "the father of Mission Control" and in 2011 NASA returned the favor by naming the Houston building that houses the nerve center after Kraft."It's where the heart of the mission is," Kraft said in an April 2010 AP interview. "It's where decisions are made every day, small and large ... We realized that the people that had the moxie, that had the knowledge, were there and could make the decisions."That's what Chris Kraft's Mission Control was about: smart people with knowledge discussing options quickly and the flight director making a quick, informed decision, said former Smithsonian Institution space historian Roger Launius. It's the place that held its collective breath as Neil Armstrong was guiding the Eagle lunar lander on the moon while fuel was running out. And it's the place that improvised a last-minute rescue of Apollo 13 — a dramatic scenario that later made the unsung engineers heroes in a popular movie.Soon it became more than NASA's Mission Control. Hurricane forecasting centers, city crisis centers, even the Russian space center are all modeled after the Mission Control that Kraft created, Launius said.Leading up to the first launch to put an American, John Glenn, in orbit, a reporter asked Kraft about the odds of success and he replied: "If I thought about the odds at all, we'd never go to the pad.""It was a wonderful life. I can't think of anything that an aeronautical engineer would get more out of, than what we were asked to do in the space program, in the '60s," Kraft said on NASA's website marking the 50th anniversary of the agency in 2008.In the early days of Mercury at Florida's Cape Canaveral, before Mission Control moved to Houston in 1965, there were no computer displays, "all you had was grease pencils," Kraft recalled. The average age of the flight control team was 26; Kraft was 38."We didn't know a damn thing about putting a man into space," Kraft wrote in his autobiography. "We had no idea how much it should or would cost. And at best, we were engineers trained to do, not business experts trained to manage."NASA trailed the Soviet space program and suffered through many failed launches in the early days, before the manned flights began in 1961. Kraft later recalled thinking President John F. Kennedy "had lost his mind" when in May 1961 he set as a goal a manned trip to the moon "before this decade is out.""We had a total of 15 minutes of manned spaceflight experience, we hadn't flown Mercury in orbit yet, and here's a guy telling me we're going to fly to the moon. ... Doing it was one thing, but doing it in this decade was to me too risky," Kraft told AP in 1989."Frankly it scared the hell out of me," he said at a 2009 lecture at the Smithsonian.One of the most dramatic moments came during Scott Carpenter's May 1962 mission as the second American to orbit the earth. Carpenter landed 288 miles off target because of low fuel and other problems. He was eventually found safely floating in his life raft. Kraft blamed Carpenter for making poor decisions. Tom Wolfe's book "The Right Stuff" said Kraft angrily vowed that Carpenter "will never fly for me again!" But Carpenter said he did the best he could when the machinery malfunctioned.After the two-man Gemini flights, Kraft moved up NASA management to be in charge of manned spaceflight and was stunned by the Apollo 1 training fire that killed three astronauts.Gene Kranz, who later would become NASA's flight director for the Apollo mission that took man to the moon, said Kraft did not at first impress him as a leader. But Kranz eventually saw Kraft as similar to a judo instructor, allowing his student to grow in skills, then stepping aside."Chris Kraft had pioneered Mission Control and fought the battles in Mercury and Gemini, serving as the role model of the flight director. He proved the need for real-time leadership," Kranz wrote in his book, "Failure Is Not An Option: Mission Control from Mercury to Apollo 13 and Beyond."NASA eventually beat Kennedy's deadline, landing the first men on the moon in July 1969. Kranz watched from Mission Control as his underlings controlled Apollo 11, but then for the near-disaster in flight on Apollo 13, he stepped in for the key decisions. He later became head of NASA's Johnson Space Center.Born in 1924, Kraft grew up in Phoebus, Va., now part of Hampton, about 75 miles southeast of Richmond. In his autobiography, Kraft said with the name Christopher Columbus Kraft Jr., "some of my life's direction was settled from the start."After graduating from Virginia Polytechnic Institute in 1944, Kraft took a job with aircraft manufacturer Chance Vought to build warplanes, but he quickly realized it wasn't for him. He returned to Virginia where he accepted a job with the National Advisory Committee for Aeronautics, not far from Phoebus.Kraft's first job was to figure out what happens to airplanes as they approach the speed of sound.After his retirement, Kraft served as an aerospace consultant and was chairman of a panel in the mid-1990s looking for a cheaper way to manage the shuttle program. Kraft's panel recommended a contractor take over the day-to-day operations of the shuttle.Later, as the space shuttle program was being phased out after 30 years, Kraft blasted as foolish the decision to retire the shuttles, which he called "the safest machines ever built." He said President Barack Obama's plan to head toward an asteroid and Mars instead of the moon was "all hocus-pocus."Kraft said he considered himself fortunate to be part of the team that sent Americans to space and called it a sad day when the shuttles stopped flying."The people of Mercury, Gemini, and Apollo are blossoms on the moon. Their spirits will live there forever," he wrote. "I was part of that crowd, then part of the leadership that opened space travel to human beings. We threw a narrow flash of light across our nation's history. I was there at the best of times."Kraft and his wife, Betty Anne, were married in 1950. They had a son, Gordon, and a daughter, Kristi-Anne. 7877

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