1981 Obama in Pakistan

"Apparently, according to the Obama campaign, In 1981 — the year Obama transferred from Occidental College to Columbia University — Obama visited his mother and sister Maya in Indonesia. After that visit, Obama traveled to Pakistan with a friend from college whose family was from there. The Obama campaign says Obama was in Pakistan for about three weeks, staying with his friend’s family in Karachi and also visiting Hyderabad in Southern India."

http://abcnews.go.com/blogs/politics/2008/04/obamas-college/