 Complete the following phrase:  After completing his political science and diplomacy degree, Chung joined Hankook Ilbo, where he worked as a journalist and an editoral writer for about 15 years. He was involved in the International Department, the Social Department, and the Political Department of the press; he used to be the Deputy Head of the latter department. In the mid-1990s, Chung took crucial roles as a Washington, D.C. correspondent; in 1994, he flew to Port-au-Prince, Haiti in order to report the 