North Korean defector Park Sang-hak protests as police block his planned rally on a road in Paju, near the demilitarized zone, in South Korea on Monday, Oct. 22, 2012. South Korea has banned activists from launching propaganda leaflets into North Korea after the North threatened to attack. (AP Photo/Ahn Young-joon)

Photo by: Ahn Young-joon

North Korean defector Park Sang-hak protests as police block his planned rally on a road in Paju, near the demilitarized zone, in South Korea on Monday, Oct. 22, 2012. South Korea has banned activists from launching propaganda leaflets into North Korea after the North threatened to attack. (AP Photo/Ahn Young-joon)