Nearly 4,000 workers at a General Motors plant near St. Louis must resume wearing face masks and social distancing because of an increase in COVID-19 cases in the area. In an alert sent to workers and obtained by the Free Press, the union told plant employees of the change Monday afternoon. The alert read, "We have been informed by the company and UAW International that based on the severe upward trend of COVID cases in the surrounding areas all GM Wentzville Assembly Center employees will be once again required to wear masks upon entering the plant starting tonight with third shift employees....