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

 
File photo of anti-North Korea leaflets in a balloon before being released in Paju
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, near the demilitarized zone separating the two Koreas at Imjingak pavillion in Paju, north of Seoul in this April 15, 2012 file photo. 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. It said that if leaflets were dropped on Monday a "merciless military strike by the Western Front will be put into practice without warning", according to the North's official KCNA news agency. A coalition of non-government and anti-North Korean groups said it would go ahead with plans to drop anti-North Korea leaflets next Monday as part of their campaign against Pyongyang. REUTERS/Lee Jae-Won/Files