IAD and SJC - face mask or hand sanitizer
Used Clear with iris scan authentication for fast check-in without need to pull down face mask to verify ID at both IAD and SJC last week January. Each had face mask or hand sanitizer, although they did say face masks run out more often. I now wear their comfy cloth mask over separate surgical mask, per Dr.Fauci advice that this approach is ~91% effective protection against Covid19.