An online petition is asking H-E-B to require masks for shoppers as the coronavirus pandemic persists. The San Antonio-based grocery store chain strongly encourages customers to wear some sort of face covering while they shop at its stores statewide, but says without orders in place requiring them, it's difficult to manage. H-E-B requires masks for employees and vendors, but not customers. The petition at Change.org had picked up more than 23,000 signatures as of Tuesday afternoon.