The Philadelphia School District is reinstating a mask mandate for students and staff while in school buildings and on buses. The superintendent says the decision was based on rising COVID case counts. (May 23) Subscribe for more Breaking News: http://smarturl.it/AssociatedPress Website: https://apnews.com Twitter: https://twitter.com/AP Facebook: https://facebook.com/APNews Instagram: https://www.instagram.com/APNews/ ​ You can license this story through AP Archive: http://www.aparchive.com/metadata/youtube/2986097476d949c09a3821e9277bf055