President Barack Obama"s special envoy arrived in South Korea on Sunday en route to North Korea for a rare meeting aimed at bringing the communist country back to international nuclear disarmament talks. Stephen Bosworth, the U.S. special representative for North Korea, will travel to Pyongyang on Tuesday in what would be the first one-on-one talks between the U.S. and the North since Obama took office in January. During his three-day trip to North Korea, Bosworth is expected to meet First Vice Foreign Minister Kang Sok Ju _ the country"s top nuclear strategist, according to South Korea"s Yonhap news agency. Before flying to Pyongyang from a U.S. air base near Seoul, Bosworth is to meet senior officials including chief South Korean nuclear negotiator Wi Sung-lac to discuss his North Korean trip, according to Seoul"s Foreign Ministry. The U.S. envoy is to return to Seoul, then travel on to Beijing, Tokyo and Moscow before flying back to the U.S. next week, according to the State Department.