File photo of anti-North Korea leaflets in a balloon before being released in Paju

( LEE JAE-WON, REUTERS / October 19, 2012 )

Anti-North Korea leaflets are seen in a balloon before anti-North Korea activists and North Korean defectors, who are now legal South Korean citizens, release balloons containing leaflets and CDs denouncing Pyongyang, towards North Korea. North Korea issued its most strident warning in months on October 19, 2012 when it threatened to open fire on South Korean territory if anti-Pyongyang leaflets were sent over from South Korean territory