http://www.swissinfo.org/eng/international/ticker/detail/North_Korean_nuclear_envoy_makes_rare_U_S_visit.html?siteSect=143&sid=7568318&cKey=1172571833000SEOUL (Reuters) - North Korea's chief nuclear envoy embarked on a rare trip to the United States on Tuesday while South Korea sent a top official to Pyongyang to persuade the North to quickly start scrapping its nuclear arms programme.
North Korean nuclear negotiator Kim Kye-gwan arrived in Beijing on Tuesday en route for talks with U.S. officials, a Chinese Foreign Ministry spokesman said.
Reclusive North Korea agreed earlier this month at six-way talks to shut down its main nuclear reactor, the source of its weapons-grade plutonium, in return for energy aid. It separately said it would halt its seven-month boycott of talks with Seoul.
North Korea has few air links with the outside world and its officials often travel via China.