Right now the u.s. president joe biden has just arrived in south korea. so you are looking at live pictures there of the air base where air force one just landed. and this is president biden s very first asia trip as president. and he is expected to meet south korea s new president to reaffirm america s support. so as we await the president coming down those steps, let s bring back kevin liptak. he a live in seoul. kevin, first the logistics. take us through the time line of his visit. reporter: it is almost a 15 flight from washington, certainly the longest journey that the president has taken. there is a refueling stop in alaska. but it is interesting when you look at the course of the president s day, he started the day thursday meeting with the