In the weeks since a federal judge in Florida struck down the federal mask mandate for planes and other transportation settings, Americans have met the change with a mix of excitement and concern. Some travelers welcomed the news, even cheering on planes when pilots announced the ruling. For others, the prospect of flying with unmasked seatmates has been a source of anxiety. The Justice Department said it would appeal the decision, but the rule has been dropped for the time being. The Centers for Disease Control and Prevention still recommends wearing a mask on flights. If you are nervous about...