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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

Tropical Storm Zeta is expected to strengthen into a hurricane before slamming into the Louisiana coast late Wednesday night with "life-threatening storm surge."Zeta is moving north of Mexico's Yucatan Peninsula Tuesday night, after dumping rain and causing potential flash flooding. As of 5 p.m. ET, Zeta was moving north at about 14 mph, with sustained winds of 65 mph. 380

Vice President Mike Pence is heading to Louisiana just as the state is re-emerging as a national hot spots for the coronavirus. He's scheduled to meet Tuesday with Gov. John Bel Edwards, members of the congressional delegation and state health officials to talk about Louisiana’s response to the pandemic. One person he won't see is Attorney General Jeff Landry, who tested positive ahead of the Pence visit and is in quarantine. Louisiana's confirmed caseload is growing fast, and its infection and hospitalization rates are surging. Edwards enacted a statewide mask mandate for people 8 and older that took effect Monday and bars are back to take-out and delivery only. 679

Unexpected fees, lack of personal space, screaming babies, scant entertainment. For most passengers today, flying is hardly a luxury experience. Seasoned travelers know the tricks for dealing with air-travel irritants, but if you’re a less-frequent flyer, here are seven of the most common headaches and how you can head them off before you get in the air. 399

Two people were killed and one "badly injured" in a knife attack Thursday morning in Trappes, a suburb west of Paris, according to France's National Police.The attacker was also killed, police said."After the attack, he ran into a house to hide. He left shortly afterward and threatened police before being neutralized," police said.Authorities have not yet given an indication of motive for the attack. The matter may have been a family dispute, CNN's French affiliate BFM-TV reported.The two people who were killed were the attacker's mother and sister, a spokesman for the Interior Ministry told CNN.Interior Minister Gérard Collomb told reporters in Trappes that "the attacker had serious psychiatric problems" and that he "was known for being a terror apologist.""He was someone who was unstable rather than committed to terrorism and who might respond to a call from ISIS," he said.The attacker was on the File for the Prevention of Terrorist Radicalization, a targeted watch list which focuses on would-be jihadists.The person who was seriously injured was not a member of the family, Collomb added. The police investigation continues, he said.ISIS claimed responsibility for the attack via its Amaq media outlet but did not provide any evidence to support the claim.The anti-terror Paris prosecution office has not yet opened an investigation into the attack, as is customary if there is a strong indication of a link to terrorism.The French Interior Ministry earlier urged the public via Twitter to "avoid the area and respect the security perimeters so as not to disrupt the police work."Collomb tweeted: "My first thoughts are with the victims and their loved ones. I want to salute the actions and the exemplary mobilization of our police forces. They are already investigating to establish the circumstances of this tragedy."On Wednesday, ISIS released what it said was a new audio message from its leader Abu Bakr al-Baghdadi, in which he purportedly issued a rallying call to supporters in the face of continued military defeats.According to BFM-TV, Trappes is a poor town in the middle of a wealthy area. Half of its roughly 30,000 inhabitants are aged under 25, the broadcaster said, and the unemployment rate is close to 20%.The-CNN-Wire 2263