Activists in South Korea are protesting North Korea's detention of an American missionary.
Some 30 demonstrators in Seoul held posters of starving children in North Korea -- a dictatorship suffering a brutal famine.
North Korea announced it has detained Robert Park for illegally entering the country.
A friend of Park's says he told her he was going to deliberately enter North Korea illegally on a mission from God to relieve suffering there and help reunify the two Koreas.
"He told us that he had a vision from God about the reunification of North Korea and South Korea, and God told him that they're going to be unified," Maggie Drabing said. "And then he also said God had told him to go into North Korea and he was just waiting for the right time, praying for the right time."
The Arizona missionary slipped into North Korea on Christmas.
Friends say he was willing to sacrifice himself to end North Korea's suffering.