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A California university is using testing and contact tracing to stop a large outbreak of Covid-19 among fraternity houses, according to media reports.The University of Southern California has reported at least 150 positive coronavirus cases. Los Angeles-area media reports that dozens of those cases were traced to three or four fraternities near campus.The fraternity houses are off-campus, and it is not clear if the infected people were fraternity members or just students renting a room for the summer.Dr. Sarah Van Orman, chief health officer of USC Student Health, does not believe the students got Covid-19 from a party."And because people live in close proximity, they sort of spread it to each other," Van Orman told ABC7. "It was not large fraternity parties, they were small gatherings, but unfortunately, it was enough to allow it to spread to these communities."Van Orman said the number of cases at the university “dropped dramatically.” She said since the first report of cases on July 9, the university has used continued testing and contract tracing to identify exposed people. 1102

A large crack, stretching several kilometres, made a sudden appearance recently in south-western Kenya.The tear, which continues to grow, caused part of the Nairobi-Narok highway to collapse and was accompanied by seismic activity in the area.The Earth is an ever-changing planet, even though in some respects change might be almost unnoticeable to us. Plate tectonics is a good example of this. But every now and again something dramatic happens and leads to renewed questions about the African continent splitting in two.The Earth's lithosphere (formed by the crust and the upper part of the mantle) is broken up into a number of tectonic plates.These plates are not static, but move relative to each other at varying speeds, "gliding" over a viscous asthenosphere.Exactly what mechanism or mechanisms are behind their movement is still debated, but are likely to include convection currents within the asthenosphere and the forces generated at the boundaries between plates.These forces do not simply move the plates around, they can also cause plates to rupture, forming a rift and potentially leading to the creation of new plate boundaries. The East African Rift system is an example of where this is currently happening.The East African Rift Valley stretches over 3,000km from the Gulf of Aden in the north towards Zimbabwe in the south, splitting the African plate into two unequal parts: the Somali and Nubian plates.Activity along the eastern branch of the rift valley, running along Ethiopia, Kenya and Tanzania, became evident when the large crack suddenly appeared in south-western Kenya. 1624

A federal judge ruled on Thursday in favor of journalists and legal observers as part of a temporary restraining order involving the response of federal agents in Portland.The ruling comes less than one day after federal agents protecting a federal courthouse in the Oregon city deployed tear gas at protesters.Among those who was tear gassed was Portland Mayor Ted Wheeler, who objected to the presence of federal agents in the city.The ruling says that federal agents cannot detain legal observers and journalists, nor can federal agents confiscate equipment used by journalists.President Donald Trump ordered federal agents to guard federal buildings and courthouses in major cities. Trump said he blames Democratic mayors for not getting a handle on the unrest that at times has become violent.“We can solve the problem very easily,” Trump said. “We're equipped with the best equipment, the best people. And you see what we're doing. I mean, Portland was coming down. It was busting at the seams and we went into protected all the federal buildings, those federal buildings that totally protected.”But the ACLU of Oregon has pushed back on the administration's response to the unrest, calling the deployment of federal agents an “escalation.”“This is a fight to save our democracy,” said Kelly Simon, interim legal director with the ACLU of Oregon. “Under the direction of the Trump administration, federal agents are terrorizing the community, risking lives, and brutally attacking protesters demonstrating against police brutality. This is police escalation on top of police escalation. These federal agents must be stopped and removed from our city. We will continue to bring the full fire power of the ACLU to bear until this lawless policing ends.”Thursday’s ruling comes after the ACLU and others claimed that the rights of journalists and legal observers were being violated. A freelance photographer, Mathieu Lewis-Rolland, tweeted video he says is of federal agents firing projectiles at him. Video of the incident can be seen here (note, video contains strong language).According to the Portland Police Department, protesters threw a “flaming item” into the federal courthouse on Wednesday. That’s when federal agents addressed the crowd.The police also reported incidents of vandalism and arsons stemming from Wednesday’s demonstration. 2360

A Dallas police officer died Wednesday morning, a day after he and a colleague were shot at a Home Depot, police said.Officer Rogelio Santander, a three-year police veteran, passed away at 8:11 a.m. of his injuries."We ask that you please continue to pray for Officer Santander's family and our department as we all try to cope with this tragic loss," police said on the department blog.Officer Crystal Almeida and loss prevention officer Scott Painter also were shot in the Tuesday incident. They remain in critical condition, but are improving."Prayers for their recovery are still appreciated," police said. "Thank you to our community and everyone at Presbyterian Hospital for your love and support during this time."The suspect, Armando Juarez, 29, was captured after a car chase that started in southeastern Dallas and ended in the northeastern area of the city.Mayor Mike Rawlings thanked police officers from Dallas and other agencies for their efforts in searching for the gunman."Incredible police work," he said on Twitter. "It sobers us to realize what our officers walk into day in and day out and how quickly they can become victims."Police said Juarez was to be charged with at least two counts of aggravated assault on a public servant and two previous felony theft warrants. Additional charges may be added, police said.Bond for Juarez has been set at million, according to jail records.The incident began Tuesday afternoon after an off-duty officer at the Home Depot called to request backup officers for an arrest.It's unclear how the shooting unfolded but authorities began looking for the gunman after he fled in a white pickup truck, police said.The officers who responded to the call were wounded, police said.Nearly two years ago, five Dallas officers were killed and seven others wounded when a military veteran who had served in Afghanistan fired on them.That shooter, Micah Xavier Johnson, 25, of Mesquite, Texas, was killed after a lengthy standoff with police.  2006

A green SUV sought after a 13-year-old girl was abducted outside her home in North Carolina has been spotted on surveillance video, authorities say.The stolen vehicle is believed to have been used in the kidnapping of Hania Noelia Aguilar, authorities said.It was caught on video in Lumberton, North Carolina, minutes after the girl was taken outside her home Monday morning.Lumberton police and the FBI are asking local residents with a camera or video surveillance systems to save the video and contact them, even if they don't see the vehicle in the footage.According to the FBI, Hania is Hispanic, about 5 feet tall and 126 pounds. She has black hair and brown eyes, and was last seen wearing blue jeans and a blue shirt with flowers. 746