„On a windy night, several helium balloons are sent to North Korea. These are no ordinary balloons. They contain scripture written in the Korean language as well as soft copies of Bibles. On several occasions, large hydrogen balloons are flown into rural parts of North Korea. These balloons are navigated by GPS to ensure they land in their destination. These balloons ferry testimonials and bibles. Christians and missionaries from South Korea do all these things with the hope that North Koreans will know they are not forgotten.”
http://www.worldreligionnews.com/religion-news/bibles-smuggled-north-korea