This speech is not addressed to Hanoi or to the National Liberation Front. It is not addressed to China or to Russia.
Nor is it an attempt to overlook the ambiguity of the total situation and the need for a collective solution to the tragedy of Vietnam. Neither is it an attempt to make North Vietnam or the National Liberation Front paragons of virtue, nor to overlook the role they can play in a successful resolution of the problem. While they both may have justifiable reason to be suspicious of the good faith of the United States, life and history give eloquent testimony to the fact that conflicts are never resolved without trustful give and take on both sides.
"Beyond Vietnam", A Time to Break Silence By Rev. Martin Luther King
I doubt Vietnam is relevant here. This visit was announced a week ago:
http://talkvietnam.com/2013/06/top-ecuador-diplomat-to-visit...
"Vietnam will be Patino’s second stopover during his Asian tour. Besides Vietnam, he will visit the Republic of Korea, Malaysia, and Singapore."