A Louisiana federal judge on Wednesday permanently blocked the federal government from enforcing its mask and vaccine mandates for children and teachers in public preschool. The Head Start program, which provides early education to infants, toddlers, and kids preparing for kindergarten, cannot require that any adults or students in the applicable centers or daycare be vaccinated against Covid-19 or wear masks, U.S. District Court Judge Terry A. Doughty ruled. The regulation applied to children as young as two years old, Doughty noted, both indoors and outdoors during activities that involve close contact with other people. The court rejected the argument...