Loop News Dealers in masks wait for customers before the reopening of the D Las Vegas hotel and casino in Las Vegas in this AP file photo. (Photo: John Locher) States and businesses scrambled Wednesday to change course after the federal government issued new guidance calling for the return of mask-wearing in virus hot spots amid a dramatic spike in COVID-19 cases and hospitalizations nationwide. Nevada and Kansas City were among the locations that moved swiftly to re-impose indoor mask mandates following Tuesday’s announcement from the Centers for Disease Control and Prevention. The guidelines also call on all schools to require masks for students, teachers and visitors, and districts around the country tried to navigate the latest advice.