South Koreans Find New Way to Evangelize

Christian activists in South Korea sent hundreds of thousands of
gospel tracts over North Korea's closed border in November using
helium-filled balloons. Equipped with a time-release mechanism, each
balloon carried 10,000 leaflets that tell the story of a 1907
Christian revival in Pyongyang, and compare Kim Jong-Il to
Nebuchadnezzar. The effort is part of a resurgence of balloon
launches, used for decades by political and religious groups to send
propaganda past the North's information blackout. Such launches
worsened relations between North and South in 2008. In response, North
Korea's government further restricted travel and communication between
the two countries.

http://www.christianitytoday.com/ct/special/photo_balloons.html