Why does Mos Def go, "Hello Vietnam." In a lot of songs. Also why does Kweli refer to Japan a lot in his songs

Answer 1

I've been trying to find the answers for you...
but the best I can do is give you some links
(maybe you can ask them directly):

Both have their "Official Pages" at:
http://www.okayplayer.com/artists.htm

MySpace:
http://www.myspace.com/mosdef
http://www.myspace.com/talibkweli