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U.S. Marshals arrested a man they say paid ,000 to come from Dubai, United Arab Emirates to Florida to have sex with a 7-year-old.William Ball is a music teacher at the Swiss International Scientific School in Dubai, but is from Mississippi.The federal indictment only lists the charges and does not give details about the alleged crime, but during a bond hearing in federal court in Tampa, the prosecutor explained that Hall was using the internet and a cell phone to set up and meet a 7-year-old.The prosecutor said he paid ,000, bought a plane ticket and traveled to meet the child.When he was apprehended, the prosecutor says he had items for a child, condoms and lubricant with him.The prosecutor also said they have extensive internet conversations regarding the case, which is being handled by the Department of Homeland Security.He is being charged with soliciting a minor for sex and child pornography. 923

Two men, including a former teacher at a Harlem school, were arrested Thursday, accused of building bombs in the Bronx, a federal criminal complaint says.Christian Toro, the former teacher, and Tyler Toro are charged with manufacturing a destructive device and the distribution of explosive materials to a minor.Authorities found bomb-making materials, including metal spheres and chemicals to make the explosive material thermite, after executing a search warrant on the Toros' apartment.Both suspects have been arraigned and remanded on the charges, two sources with direct knowledge of the case told CNN. 615

VALLEY CENTER, Calif. (KGTV) -- The owner of a Valley Center pizza shop was arrested for alleged sexual battery, according to the San Diego County Sheriff’s Department. According to the Department, Mark Desimone, the owner of Pizza Pazza was arrested on September 5 for multiple counts of sexual battery. The department says the arrest stems from an investigation by detectives in Valley Center. According to investigators, the incidents occurred at Pizza Pazza at an unspecified time. The department says there could be more victims. Anyone with information is asked to call Detective J. Van Oort at 760-751-4422. 623

University of Maryland's football coach and athletic director will keep their jobs after an investigation into the death of Jordan McNair, a 19-year-old offensive lineman who died of heatstroke two weeks after taking part in an offseason conditioning session.The announcement was made Tuesday by the University System of Maryland board of regents.Wallace D. Loh, president of the University of Maryland, said he planned to retire next year after helping implement reforms that improve the well-being of athletes.Coach D.J. Durkin and some members of the athletic staff have been on administrative leave since August. The university parted ways with its strength coach, Rick Court. 688

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