Why Is the TSA Making Vaccinated Air Travelers Wear Masks?

Yesterday I visited a movie theater for the first time in more than a year. Amid the endless ads and previews, the management repeatedly begged us to see upcoming releases in a theater rather than watching them at home, touting the advantages of a big screen and superior sound. Cinemark also emphasized its COVID-19 control measures, including elaborate yet generally pointless precautions such as seat wipes and frequent swabbing of surfaces. But the most appealing thing to me was a safeguard the chain has abandoned: Face masks are now "optional for fully vaccinated guests."

While...