atdo want to take a look pope francis. his airplane has arrived in maryland. we are watching officials there. there he is. he is disembarking from the plane. you can hear the cheers. they are loud. the cardinals have been waiting all day to see him. president obama and first lady , vicele obama president joe biden, all waiting to see him there as well. alix: there has been a lot of talk about the protocol for meeting the pope. and congress, they had to pass out rules about what to do. in congress, they had to pass out rules about what to do. it is extraordinary. joe: this is only the third president the pope has ever met. thisis a monumental moment for the united states and pope francis. what you do when you are a catholic? i think you are supposed to kiss the ring. alix joe biden, the first catholic president. vice president joe biden did not kiss the ring. he opted out. he shook his hand instead. he has a huge timetable over the next few days. tomorrow, a welcome ceremony with president obama at the white house in the morning. a papal parade at the national