Walmart, the largest private employer in the U.S., announced Friday that customers are no longer required to wear masks in its more than 5,000 stores nationwide. The retail super store changed the rules one day after the CDC declared it was safe for fully vaccinated adults to resume most activities, indoors or out, in groups or individually, mask free and without social distancing. Walmart is requesting that customers who have yet to receive their vaccine continue to wear a mask, a Walmart news release said.