An Arizona school board canceled a meeting and called in police on Tuesday after parents entered the meeting to protest an extension of the district’s mask mandate. The Vail School Board, which oversees a district southeast of Tuscon, called 911 after parents pushed into the meeting room without wearing masks and demanded to rescind the district’s masking requirement for students and teachers. Around 100 parents, some apparently with their children, arrived to protest the mandate, with most remaining outside during the duration of the events. The district said local sheriffs advised them to leave because of crowd-control difficulties, however the...