Tensions boiled over Wednesday at a Downingtown Area School District board meeting when a district employee, guarding the door to prevent the unmasked from entering, got into a physical altercation with a parent. The Chester County Pennsylvania school district requires everyone attending the meeting to wear a mask. The rule is enforced with guards at the door, guards in the meeting, and police on speed dial. In early December, the state Supreme Court ruled that the state Department of Health, no longer working under an emergency order, did not have the authority to continue requiring schools to mask students. At that point, school boards could decide individually if they wanted to require masking. Many opted to end masking immediately, or make it optional, but Downingtown continues requiring masking and parents have been attending meetings for months, asking for them to change the rule. Nathan Laing, father of two, had a …