america s largest airlines speaking out about the federal mask man kate for plans. it s set to expire come september. let s check in with cnn s pete. reporter: masks are still required on all forms of transportation. planes, trains, buses, boats, terminals. united airlines ceo says he hopes the federal transportation mask mandate will expire when it s set to go away on september 13th. it is the biggest difference in travel right now. but it is clearly not holding people back. 2,198,000 people passed through airport security checkpoints according to the tsa on sunday. that s fbiggest number since february of 2020. even bigger than the big numbers over the july 4th weekend. here is what the ceo said. my guess is that the current government order expires on september 13th. and fingers crossed, my guess is it will expire on