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TUCSON, Arizona — As teachers vote on a potential walk out their employers are trying to figure out what to do if that happens.Tucson Unified School District Superintendent Gabriel Trujillo said Tuesday a prolonged walk out that affects final exams could jeopardize high school graduation schedules.He says TUSD is trying to find a way to keep schools open and busses running so students who rely on schools for meals can eat. That would include a skeletal bus schedule and at least some staff coming to work. “Schools physically would be open, but instructional services would be closed. There would be no classes running,” Trujillo said.He said the district does not a have substitute pool large enough to fill classrooms in the case of a walk out. 763

US President Donald Trump has pointed to a massive caravan of migrants trekking north through Mexico as a major issue in the upcoming midterm elections.But when Election Day rolls around, on November 6, the caravan could still be somewhere in the middle of Mexico, given the group's current location, how fast it's been traveling and how long it's taken other groups of migrants to cross the country.On Tuesday, the caravan was in Huixtla, Mexico, about 50 miles from the Mexico-Guatemala border, where many of the caravan's members skirted authorities and crossed in rafts.It's still too soon to know exactly where along the vast US-Mexico border the bulk of this caravan will travel.The group only recently crossed into Mexico, and members are charting their movement daily.Organizers have told CNN they still don't know exactly which route they'll take. Much depends on the Mexican government and what routes the caravan is allowed to travel, whether its members are detained or held in certain areas and whether the group is provided with buses to speed their journey.There's a possibility some members of the caravan will split off and try to make their own way to the US-Mexico border, and that others will decide to stay in Mexico -- or return to their home countries. There's also a possibility Mexican authorities will detain members of the caravan at some point along their journey.The safest route would take them to Tijuana, across the US border from San Diego. A large caravan that crossed Mexico in the spring -- and also drew ire from President Trump -- took more than 30 days to reach Tijuana from Tapachula, Mexico -- a city this caravan departed on Monday.The closest border crossing to this caravan would be between Matamoros, Mexico, and Brownsville, Texas, about 1,111 miles away from the caravan's current location. But heading that way is considered a more dangerous route.To date, the caravan has traveled about 20 miles a day, largely on foot. If the caravan continues at that rate, reaching Tijuana could take months, and reaching Matamoros could take weeks. 2117

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

Two men were stabbed inside a Macy's store at the Mall of America in Minnesota just before closing Sunday night, the Star Tribune reports. The suspect was taken into custody following the incident. Police said it was an "interrupted theft" that led to the stabbings. According to police, the suspect waited until two men left the dressing room and then attempted to steal their belongings. The men interrupted the suspect, who pulled a knife and stabbed the victims. Other shoppers subdued the suspect until police arrived.The victims had non-life threatening injuries. 607

URBANA-CHAMPAIGN, Ill. – As colleges and universities are tasked with safely beginning classes, researchers at one school are ramping up testing. But they're putting away the nasal swab in exchange for a test they say can be scaled to perform thousands of tests a day with turnaround in just hours.College junior Alliyah Rumbolt-Lemond is already back on campus and regularly testing for COVID-19.“I know if you have in-person classes, you're going to be on campus, you have to get tested twice a week,” she says.The college junior is one of the more than 51,000 students at the University of Illinois at Urbana-Champaign returning to school during the pandemic, posing a logistical challenge for administrators.“It was very daunting,” said U of I chemistry professor Marty Burke.He was part of the team of university researchers who developed a two-step saliva-based COVID-19 test to tackle the problem.“We called this our ‘target, test and tell’ initiative, overall collectively described as a ‘Shield.’”The Shield Initiative needed to be scalable, and unlike the four-step nasopharyngeal swab tests, not vulnerable to supply chain bottlenecks.“It's a very powerful concept that if we can get to that fast, frequent testing, we really could get control of the situation,” said Burke.A quick stop on route to class or work, integrated with local health care agencies, students receive results on an app within hours, not days.“It takes about five to ten minutes to submit your saliva sample and then the results are typically back on your phone within three to six hours,” said Burke.The university’s veterinary school diagnostic lab has been converted into a full-scale human COVID-19 testing facility. It’s capable of processing some 10 to 20,0000 saliva tests per day.“I want to hang out with friends and do it the right way, like following CDC guidelines,” said Alliyah. “But I feel more comfortable saying ‘hey when's the last time you got tested?’”A total of 20 testing sites with 40 stations are set up across campus. Users can even get exposure notifications if they’ve been in contact with someone who tests positive.“If someone tests positive then same day that person is isolated,” said Burke. “Which we think is critical for ultimately the efficacy of the testing program.”They’ve published a pre-print paper on their COVID-19 saliva test, which is undergoing peer review and are seeking FDA approval.For students like Alliyah, it’s one-stop piece of mind.“It makes you feel like I'm safer on campus because even though we only have to get tested twice a week you can get tested every day the testing site is open if you wanted to.” 2653