Since September, I've been flying a lot. According to the airlines, it's all about ventilation. As all of you probably know, commercial airlines not only recirculate cabin air through HEPA filters but also pull in fresh air from outside, even at high altitude. Delta airlines has been leaving most middle seats open, but on United we were packed in tight as ever, and when the flight attendants passed out the kibble and bits nearly everyone dropped their mask and were fully exposed! Oh...the horror. I have not heard of any mass outbreaks from air travel. If it were happening, I'm sure the evening news would be all over it. Bottom line: If stadiums are well ventilated and adequately filter the air, perhaps arena capacities could be safely increased. I doubt politicians will budge, however; pro sports is not a priority for them.