**FILE** South Korean nuclear envoy Wi Sung-lac (second from left) is escorted by officials upon his arrival at Beijing Capital International Airport in Beijing on Aug. 25, 2011, for talks with his Chinese counterpart, Wu Dawei, on North Korea’s nuclear program. (Associated Press)
North Korean workers unload emergency flood aid sent from the United States at the Pyongyang airport in North Korea on Saturday, Sept. 3, 2011. The small but symbolic shipment of emergency aid for the flood-stricken North is the latest sign of a thaw in relations between the countries. (AP Photo/Associated Press Television News)
North Koreans gather to send off the leisure boat Mangyongbong on a trial cruise to the Mount Kumgang resort from the port in Rason, North Korea, on Tuesday, Aug. 30, 2011. Since the North barred South Korean tourists from the luxury resort, known abroad as Diamond Mountain, North Korea has begun courting Chinese and other international visitors. (AP Photo/Ng Han Guan)
North Korean leader Kim Jong-il waves goodbye to Russian President Dmitry Medvedev (not pictured) after a meeting at a military garrison outside Ulan-Ude, Russia, on Wednesday, Aug. 24, 2011. (AP Photo/RIA Novosti, Dmitry Astakhov, Presidential Press Service)
North Korean leader Kim Jong-il (right) is greeted by Russian President Dmitry Medvedev on Wednesday at a military garrison near the city of Ulan-Ude in Buryatia, a predominantly Buddhist province near Lake Baikal, Russia. (Associated Press)
North Korean leader Kim Jong-il (left) meets with Russian President Dmitry Medvedev (right) at a military garrison outside Ulan-Ude, Russia, on Wednesday, Aug. 24, 2011. (AP Photo/RIA Novosti, Dmitry Astakhov, Presidential Press Service)
A limousine without license plates reportedly carrying North Korean leader Kim Jong-il is seen in Ulan-Ude, Russia, on Tuesday, Aug. 23, 2011. (AP Photo/Anna Ogorodnik)
North Korean leader Kim Jong-il (in tan suit) walks up a ramp to the carriage of his armored train at the Bureya railway station in Russia's eastern Siberia region on Sunday, Aug. 21, 2011. (AP Photo/IA Port Amur, www.portamur.ru)
Sohn Hak-kyu, South Korean chairman of the opposition United Democratic Party, says the 2018 Winter Games “should be the Olympics of peace and reunification” involving North Korea. (Associated Press)
North Koreans shout slogans during a massive rally in Kim Il-sung Square in Pyongyang, North Korea, on Monday, July 4, 2011, to denounce the conservative government of South Korean President Lee Myung-bak as a "group of unparalleled traitors." (AP Photo/Korean Central News Agency via Korea News Service)
United States' Rachel Buehler is congratulated by her teammate United Alex Krieger after scoring their side's 2nd goal during the group C match between the United States and North Korea at the Women’s Soccer World Cup in Dresden, Germany on Tuesday. (AP Photo/Marcio Jose Sanchez)
At Seoul's Koreana Hotel, guests are provided a Bible and a gas mask — a sign of South Koreans' growing suspicions of North Korea's military intentions. (Ben Birnbaum/The Washington Times)
Robert King, left, U.S. special envoy for North Korean human rights issues, and U.S. citizen Eddie Jun, right, prepare to leave Pyongyang, North Korea, on Saturday May 28, 2011. (AP Photo/Kyodo News)
A limousine believed to be carrying North Korean leader Kim Jong-il drives ahead of a convoy of cars traveling toward the Great Hall of the People in Beijing on Wednesday, May 25, 2011. Mr. Kim reportedly arrived in Beijing on Wednesday for a meeting with Chinese President Hu Jintao that would highlight the influence that economic powerhouse China has with the isolated regime, which is struggling to feed its people. (AP Photo/Ng Han Guan)
North Korean leader Kim Jong-il (second from right) leaves a hotel in Mudanjiang in northeastern China on Friday, May 20, 2011. Mr. Kim, who rarely travels abroad, made an unusual third trip in just more than a year to China, his country's main ally and benefactor, news agencies reported. (AP Photo/Kyodo News)
A protester holds a sign with a photo of Stephen Bosworth, U.S. special envoy for North Korea policy, as others shout slogans during a rally demanding the resumption of peace talks between the two Koreas and six-party talks, in Seoul on Tuesday, May 17, 2011. The placard reads, "Start the meeting between two Koreas and six-party talks." (AP Photo/Lee Jin-man)