Originally Posted by coachflyer
I am just curious if Presidents, Prime Ministers, etc., need visas when visiting other countries? Once, in Korea, I saw the lone GI, who traveled on the same plane with me, was led away without having to go through immigration.
The formalities are generally taken care of by the appropriate protocol people on the host and home side. This often means the aide(s) handling the paperwork and passports (and often visas) before departure and on arrival; this does not generally or necessarily require personal contact with the general immigration authorities.
It also depends on which countries are being visited and by whom, but this is a subsection of the above.