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Twitter CEO Jack Dorsey says "we're ready to question everything" about the social networking site that has been overrun by spam, abuse and misinformation.Dorsey says he and his team are working extensively behind the scenes to stamp out some of the harassment and hate speech that has generated bad headlines lately.But it is a long-term effort, he says, and he is reluctant to commit to an exact timetable for certain changes to Twitter's foundation.In twelve years, "we've changed a lot. But we haven't changed the underlying fundamentals," Dorsey told CNN in an in-depth interview at the company's headquarters on Friday.The basic fundamentals are what he is examining now. For instance: What does Twitter incentivize its users to do?"Every product decision we make is 'telling' them to do something," Dorsey said.So he is thinking about how to help users follow topics and hashtags, not just people."We are aware of some of the silos and how we're isolating people by only giving them crude tools to follow accounts. We need to broaden our thinking and get more back to an interest-based network," he said.Related: Twitter's Jack Dorsey: 'We are not' discriminating against any political viewpointDorsey is also rethinking how follower counts and "likes" on posts are displayed, because the race to gain followers and likes may encourage outrageous behavior.His view is that Twitter needs to be much more "transparent" and open about its actions. But that transparency, some of which was on display during Dorsey's media tour this month, means asking questions without actually answering them.Among the questions Dorsey asked in the CNN interview: "How do we earn peoples' trust?" and "How do we guide people back to healthy conversation?"While he may get credit for asking big, philosophical questions about how his site operates, Dorsey remains vulnerable to criticism about Twitter's inaction.He responded to that by saying "we are taking a lot more action than we ever have in the past." But much of the action is invisible to users, he asserted.For example: The disabling of bot networks and other suspicious accounts. Dorsey said Twitter challenges "10 million accounts every single week to see if they're automations or humans," and takes action accordingly.But Twitter's stock plunged last month when its quarterly earnings report showed a decline in user growth, which the company attributed to its efforts to clean up the site, akin to gardeners removing weeds.Nonetheless, Dorsey is committed to what he calls "conversational health" -- the quality of an exchange on Twitter -- which he is trying to measure with the help of two research groups. He said investors should take a look at the long-term trends: "We see this as necessary and right and we believe in it and we have conviction around it, and we'll take the hit in the short term."Related: Twitter is purging suspicious accounts from your follower countHe also asserted that "over the short term, a lot of this work is invisible, and over the long term, it starts to add up."As for some of the specific changes, like a rethinking of the like button, Dorsey was reluctant to talk about a timeline."We're looking and thinking about all these things right now," he said. So: By the end of the year? "I worry about a time frame like that," he said, "because we also need to take into consideration -- we're a small company. I mean we, in comparison with our peers, we're a small company, but we have this outsized impact and I believe, importance."Later, he added, "We have to understand first the problem we're trying to solve, like what incentives we actually want to drive; not just what we want to remove, but what we want to drive." But he said he knows he wants incentives "that encourage people to talk and to have healthy conversation." 3824

Uber continues to aim for the sky.The tech company has partnered with NASA to help it develop air traffic management systems for its flying taxi initiatives, chief product officer Jeff Holden said on Wednesday. Holden made the announcement at Web Summit, a technology conference in Lisbon.Uber previously unveiled its plans to introduce flying taxi fleets, known as uberAIR, in April.The four-person ridesharing flights won't become a reality anytime soon but Holden said there are plans for demonstrations of the flying car network in Los Angeles, in addition to previously announced cities, Dallas and Dubai, in 2020.Hear Uber CPO Jeff Holden talk about their partnership with NASA: 692

Twenty Republican senators are urging FDA Commissioner Stephen Hahn to declare a commonly used abortion pill as an "imminent hazard to the public health," a designation that would ban the drug in the U.S. and conceivably limit abortions across the country.In a letter published on the website of Sen. Ted Cruz, R-Texas, the lawmakers ask Hahn to ban Mifeprex, and its generic counterpart, mifepristone. In their letter, the senators say the drug "should never have been approved."The request comes amid a court battle over laws that require women to pick up the pill in person, even if they had already consulted with a doctor.Despite the COVID-19 pandemic, the Trump administration chose to keep those requirements in place. In May, the ACLU sued, arguing that the laws placed an undue burden on women seeking a legal right to an abortion during the pandemic. In July, a Maryland judge sided with the ACLU, granting their request for a preliminary injunction that would allow the drug to be delivered through the mail during the pandemic.According to the ACLU's lawsuit, mifepristone is the only drug in a list of 20,000 FDA-approved drugs that require doctors to distribute in person but can be taken while not in the care of a doctor.The senators' letter claims that it is "unconscionable" that the drug is currently being prescribed without blood tests, ultrasounds and that doing so could lead to hemorrhaging and death. They also claim that without in-person requirements, women "will be left to engage in the form of "DIY" chemical abortion."However, according to a 2018 report from the National Academies of Sciences, Engineering and Medicine, complications from using abortions pills are "rare" and only occur in a "fraction" of patients. Studies have also shown that women often turn to dangerous "DIY" abortions if they don't have access to legal abortions.The ACLU's lawsuit said that 4 million women in the U.S. have used mifepristone, and that the drug accounted for nearly 40% of all abortions in 2017. 2025

Two nooses were discovered on the grounds of the Mississippi state Capitol on Monday morning, along with signs referring to Tuesday's Senate special election, a state spokesperson said."We are hanging nooses to remind people that times have not changed," reads one of the signs, said Chuck McIntosh, director of communications for the Mississippi Department of Finance and Administration, which oversees the Capitol Police."Tuesday Nov 27th thousands of Mississippians will vote for a senator. We need someone that will respect lynched victims," reads another sign, McIntosh said.CNN affiliate WLBT alerted Capitol Police to the items. An investigation is underway. Officials say they will release pictures of the signs and nooses later Monday.The items were found one day before Republican Sen. Cindy Hyde-Smith faces former Democratic congressman Mike Espy in a Senate race that has drawn attention to the state's history of racist violence.A series of recordings surfaced that featured Hyde-Smith making comments about attending a "public hanging" and suppressing the votes of students in the state.Additionally, Hyde-Smith once promoted a measure that praised a Confederate soldier's effort to "defend his homeland" and pushed a revisionist view of the Civil War, CNN's KFile reported over the weekend.Hyde-Smith accused Democrats of weaponizing the "public hanging" remark and said she would apologize to anyone who was offended by it. 1473

Two major airlines. A cybersecurity firm. Six car rental brands. A home security company. An Omaha bank. Companies have scrambled to cut ties with the National Rifle Association over the past couple of days, and the list continued to grow into the weekend.Delta Air Lines announced Saturday morning that it's ending discounted rates for NRA members. "We will be requesting that the NRA remove our information from their website," the company said in a tweet.United Airlines followed a short time later, saying the company will no longer offer discounts on flights to the NRA annual meeting.And TrueCar, a car buying service, said late Friday that it would end its deal with the NRA as of February 28.The companies were the latest to abandon partnerships with the NRA amid a renewed public debate over tightened gun laws following a school shooting in Florida last week that left 17 dead.First National Bank of Omaha on Thursday pledged to stop issuing an NRA-branded Visa card. A bank spokesperson said "customer feedback" prompted a review of its partnership with the NRA, and it chose not to renew its current contract.There was also a wave of car rental outfits. Enterprise Holdings, which runs the Enterprise, Alamo and National car rental groups, announced that it will end the discount deal it has with the NRA on March 26.On Friday, car rental company Hertz said in a tweet that it's also ending its NRA rental car discount program.The NRA was advertising a Hertz partnership on its "member benefits" page as recently as Friday morning, but that listing disappeared by the afternoon.The National Rifle Association did not immediately comment on Saturday about the decisions by the various companies to sever ties.Avis and Budget, which are owned by the same company, were also listed as discount providers on NRA's website Friday. But when reached for comment, Avis Budget Group told CNNMoney that it too was ending its partnership with the organization."Effective March 26, our brands will no longer provide the NRA member discount," an Avis Budget Group spokesperson said via email.More big names followed suit.A spokesperson for moving van lines Allied and North American, which are both owned by Sirva, said Friday that the brands "no longer have an affiliate relationship with the NRA effective immediately.""We have asked them to remove our listing from their benefits site," the spokesperson added. The company did not describe what kind of benefits had been offered to NRA members.Insurance giant MetLife said Friday that it's ending its discounts on home and auto insurance for NRA members.Symantec, which makes the Norton anti-virus software and owns the identity theft protection company LifeLock, said Friday that it is severing ties with the NRA. And SimpliSafe, which sells home security systems, said the same.Related: First National Bank of Omaha will stop issuing NRA Visa cardNone of the companies gave details about why or when they decided to cut ties with the NRA, but the news comes as the hashtag #BoycottNRA has circulated widely on social media.After the shooting in Parkland, Florida on February 14, survivors of the massacre have protested for stronger gun laws. Students across the country have walked out of class to demand new restrictions on the sale of firearms and an end to mass shootings in the U.S.Some survivors of mass shootings confronted NRA spokeswoman Dana Loesch at a CNN town hall on Wednesday. Loesch blamed a flawed system for letting people who shouldn't be able to buy guns slip through the cracks.Two other companies -- the insurer Chubb and Wyndham Hotel Group -- confirmed to CNNMoney Friday that they've recently ended partnerships with the NRA. However, those decisions were made prior to the shooting at Marjory Stoneman Douglas High School in Parkland, Florida last week.Chubb said in a statement that it "provided notice of our intent to discontinue participation in the NRA Carry Guard insurance program" three months ago.The NRA Carry Guard program offers coverage for certain costs associated with gun-related accidents or incidents in which the gun owner claims they lawfully acted in self defense.Lockton, another insurance firm, continues to underwrite policies for the NRA Carry Guard program, according to the NRA's website. Lockton did not immediately respond to a request for comment.Wyndham Hotel Group said in a statement that it "ended our relationship with the NRA late last year."--CNN's Julia Horowitz, Emanuella Grinberg and Steve Almasy contributed to this report. The-CNN-Wire? & ? 2018 Cable News Network, Inc., a Time Warner Company. All rights reserved. 4650