The Korean peninsula has been divided between South and North Koreas since the end of the Korean War in 1953, with Demilitarized Zone (DMZ) stretching 2km on each sides of the border: it is "the most heavily armed border in the world", and a popular tourist destination [Korea Tourism Organization, 2010].
Since the sinking of the South Korean navy corvette Cheonan, both sides have intensified propaganda operations across the border in attempts to reach citizens across the border, broadcasting through loud speakers and radio. Activists in South Korea have been floating helium balloons with leaflets, in an effort to deliver messages to citizens in North Korean (BBC, 2010), where the government threatening to close up its border (Branigan, 2010).
A BBC news clip from 2008
BBC (2010) Inter-Korean Crisis: Propaganda Fight. [Online]
BBC (2008) Propaganda balloons Enter N Korea. [Online]
Branigan, T. (2010) North Korea Threatens to Close Border with South as Relations Worsen. [Online] http://www.guardian.co.uk/world/2010/may/26/north-korea-border-south-relations-worsen [27/05/2010]
Korea Tourism Organization  DMZ Tours. [Online]
Thatcher, J. (2009) Border Tension: N. Korea Tries to Push Obama with S. Korea Threat. [Online] http://www.welt.de/english-news/article3118038/N-Korea-tries-to-push-Obama-with-S-Korea-threat.html [27/05/2010]
Getz, A. (2010) War Tour. [Online] http://www.newsweek.com/2010/04/15/war-tour.html [27/05/2010]
Troy, T.M.Jr. (2008) The Cultural Cold War: The CIA and the World of Arts and Letters. [Online] https://www.cia.gov/library/center-for-the-study-of-intelligence/csi-publications/csi-studies/studies/vol46no1/article08.html [27/05/2010]