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They've spent weeks trekking across Mexico, trying to reach the United States. But dozens of migrants will be deported and will never touch US soil, Mexican authorities said.About 500 migrants on the Mexican side of the border overwhelmed police blockades near the San Ysidro Port of Entry on Sunday, two journalists in Tijuana told CNN. That forced a temporary closure of the major border crossing into San Diego.Tijuana police said they arrested 39 people Sunday in connection with the attempt to cross the border illegally.Those identified as trying to rush the US border illegally will be processed for deportation in their home countries, Mexico's Interior Ministry said.On the US side, about 42 people who managed to cross the border were arrested, said Rodney Scott, chief patrol agent of the San Diego Sector Border Patrol."Only eight of those were females, and there were only a few children involved," he said. "The vast majority of the people we're dealing with are adult males."US President Donald Trump threatened to close the border "permanently if need be." He also claimed many of the migrants are "stone cold criminals," but gave zero evidence to support that claim."Mexico should move the flag waving Migrants, many of whom are stone cold criminals, back to their countries," Trump tweeted Monday. "Do it by plane, do it by bus, do it anyway you want, but they are NOT coming into the U.S.A. We will close the Border permanently if need be. Congress, fund the WALL! 1491

Their youthful brains were developing normally, with no signs of developmental, psychological or neurological problems. None had ever had a concussion. But by the end of a single football season, 24 children between the ages of 9 and 18 who had more frequent impacts to the head showed signs of damage to brain development, new research says."Repetitive head impact exposure may have a cumulative effect in the rapidly developing brains of youth and high school football players," said study co-author Gowtham Krishnan Murugesan, a radiology research assistant at UT Southwestern Medical Center in Dallas, adding that the results mirror other recent findings.The study outfitted 60 youth and high school football players who had no history of head trauma or developmental issues with a head impact telemetry system that measures the magnitude, location and direction of impacts to the head. The researchers were not looking at whether the impact resulted in a concussion, only that impact occurred.The children were sorted into two categories: high cumulative head impact players (24) and low cumulative head impact players (36).Before beginning to play, each child had a resting state functional scan, known as an fMRI; the scans were repeated at the end of football season. The researchers were trying to see how exposure to repetitive hits affects the normal "pruning" process in the brain that occurs during adolescence."Pruning is an essential part of brain development," Murugesan said, comparing the process to how a tree needs to have dead or unneeded branches cut to keep it healthy and allow it to grow."Disruption in normal pruning has been shown to be related to weaker connections between different parts of the brain," he said.After comparing the functional MRI results to the player's level of impact, the researchers found that youth in the high-impact group had damage to their brains' pruning process after one season."Our study has found a significant decrease in gray matter pruning in the frontal default mode network, which is involved in higher cognitive functions, such as the planning and controlling of social behaviors, " Murugesan said.Although the "teenage years are a critical time for brain development, brain remodeling or synaptic pruning, this was a short-term study and did not follow the players longitudinally over several years. We don't really know the full application," said Dr. Julian Bailes, director of neurosurgery and co-director of the NorthShore University HealthSystem Neurological Institute, who was not involved in the research.Weill Cornell neurologist Dr. Richard Isaacson, who was also not involved in the study, called the research "early" and said the results don't necessarily "translate to a clinical or cognitive outcome." More research is needed to see whether the decline in brain pruning permanently affected the child's cognitive function or whether the brain's natural plasticity allowed it to repair itself."I would call this a pilot study," Isaacson said. "The call to action would be that we need more robust longitudinal studies with a pre- and a post-assessment of more than brain imaging. The study should also measure cognitive and neurological function and look for changes."As we learn more about the issue, Isaacson said, parents should do everything they can to limit contact in sports, "especially in practice before games, where studies show the majority of contact occurs." 3464

Toilet paper, cleaning products, meat, and now possibly pepperoni. One of America’s favorite pizza toppings could become scarce due to the coronavirus pandemic.Pepperoni is becoming more expensive due to production slowdowns at meat plants and the high demand for pizza.Small pizza shops say pepperoni is now a pound — up from earlier this year, Bloomberg reported.Larger pizza chains have pre-negotiated contracts, so they haven’t been hit by the price increases or shortages just yet.This story was first reported by Lauren Cook at WPIX. 553

To qualify for naturalization, a person must be at least 18 years old, have been a permanent resident for at least five years, and meet all other eligibility requirements.Those requirements include a civics test. Could you pass? Take the practice test below!Citizenship applicants are asked to answer about 10 questions off of a list of 100. The topics range from the rights outlined in the Declaration of Independence, to naming the current Chief Justice of the Supreme Court.In order to graduate high school, all Arizona students must also take and pass the same civics test.State law passed by the legislature in 2015 requires students to score 60% or higher on a 100 multiple-choice question test in order to receive a diploma or a high school equivalency certificate.  786

Theresa May vowed to fight for her political life Wednesday after members of her own party triggered a vote of no-confidence in her leadership over her handling of Brexit.If she loses the vote, which will take place on Wednesday evening, she will be out as British Prime Minister.The starting gun was fired after 48 Conservative Members of Parliament submitted letters demanding a vote to the 1922 Committee, which represents rank-and-file Conservative MPs in the House of Commons.Appearing on the steps of Downing Street, May was in bullish mood, promising to fight the contest with "everything I've got." 614

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