He is the only president born outside the contiguous 48 states. He was born to an American mother of European descent and an African father. In mid-1981, Obama traveled to Indonesia to visit his mother and half-sister Maya, and visited the families of college friends in Pakistan and India for three weeks. Later in 1981, he transferred as a junior to Columbia University in New York City, where he majored in political science with a specialty in international relations and in English literature and lived off-campus on West 109th Street.