Mask whiplash strikes Philly amid changing rules across US

              A grocer wearing a protective mask as a precaution against the spread of the coronavirus arranges produce at the Reading Terminal Market in Philadelphia, Friday, April 22, 2022.  The city abandoned its indoor mask mandate Friday, just days after becoming the first U.S. metropolis to reimpose compulsory masking in response to an increase in COVID-19 cases and hospitalizations.  (AP Photo/Matt Rourke)