A technician of AhnLab Inc. works against cyberattacks at the company's Security Operation Center in Seoul, South Korea, Friday, March 4, 2011. Hackers attacked about 40 South Korean government and private websites Friday, prompting officials to warn of a substantial threat to the country's computers. (AP Photo/Lee Jin-man)
North Korean defectors shout slogans as police block their planned rally on a road in Paju, South Korea, near the demilitarized zone, on Monday, Oct. 22, 2012. The activists launched balloons with anti-Pyongyang propaganda leaflets to the North despite a ban by the South Korean government. (AP Photo/Ahn Young-joon)
North Korean defectors shout slogans as police block their planned rally on a road in Paju, South Korea, near the Demilitarized Zone, on Monday, Oct. 22, 2012. The activists launched balloons with anti-Pyongyang propaganda leaflets to the North despite a ban by the South Korean government. (AP Photo/Ahn Young-joon)
Activist No Su-hui (center) shouts "Long Live Reunification" in front of North Korean officials and soldiers before crossing the demarcation line between North and South Korea where South Korean officials (in background) were waiting for him, at the Demilitarized Zone at Panmunjom, Korea, on July 5, 2012. South Korean officials immediately detained the activist for making an extended trip to Pyongyang without South Korean government approval as required by law. (Associated Press)
Activist No Su-hui (center) shouts, "Long live reunification!" in front of North Korean officials and soldiers before crossing the demarcation line between North and South Korea where South Korean officials (in background) were waiting for him, at the Demilitarized Zone at Panmunjom, Korea, on Thursday, July 5, 2012. South Korean officials immediately detained the activist for making an extended trip to Pyongyang without South Korean government approval, as required by law. (Associated Press)
South Korean environmentalists hold umbrellas beside jets of water during a rally demanding South Korean government to stop expanding nuclear power plants in Seoul, South Korea, Wednesday, April 6, 2011. Fears over possible radiation contamination are growing in South Korea, the country closest to Japan, after Japanese nuclear power plants were damaged by earthquakes last month.(AP Photo/Ahn Young-joon)
A technician of AhnLab Inc. works against cyberattacks at the company's Security Operation Center in Seoul, South Korea, Friday, March 4, 2011. Hackers attacked about 40 South Korean government and private websites Friday, prompting officials to warn of a substantial threat to the country's computers. (AP Photo/Lee Jin-man)
In this photo released by the South Korean navy via the Yonhap news agency, South Korean naval special forces approach the South Korean cargo ship Samho Jewelry in a military operation in the Arabian Sea on Friday, Jan. 21, 2011. In a daring raid, the special forces stormed the hijacked freighter and rescued all 21 crew members being held by Somali pirates, eight of whom were killed, the South Korean government said. (AP Photo/South Korean navy via Yonhap)
Anti-government protesters shout slogans and hold signs during a rally against the South Korean government's policies and financial plans on Sunday, Dec. 5, 2010, in Seoul. (AP Photo/Wally Santana)
