"A vaccine requirement for a person getting on the plane is just another level of getting people to have a mechanism that would spur them to get vaccinated. Namely, you can't get on a plane unless you're vaccinated, which is just another one of the ways of getting requirements, whatever that might be," he added. He also continued to reiterate that wearing masks on planes is still a good idea despite airline CEO's saying they were not always necessary due to sufficient air filtration systems inside aircraft. "I think the idea of taking masks off, in my mind, is really...