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'These kids are terrified:' First day of school in Uvalde riddled with anxiety, grief
As parents watch, Uvalde students return to class more than three months after 19 students and two teachers were killed in a mass shooting at Robb Elementary. NBC News' Antonia Hylton and Priscilla Thompson report on how families have been mentally preparing in the summer for the school year and the increased security measures local authorities are taking.