Larry King: Will North Korea Free American Journalists?

This is from Larry King's story on June 1st.
CNN: Larry King Live
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The Ling sisters held for court sentence in North Korea: Lisa Ling Speaks Out
June 1st, 2009

Lisa Ling apologized for her tow sisters; both journalists, who are being detained in North Korea awaiting trail (June 4th) for "illegal incursion into North Korea".The sisters were writing a piece which involved illegal trafficking across the border between North and South Korea.Lisa Ling is worried because the US and North KOrea do not have a formal diplomatic relationship, so she says it is ahrd to accomplish anything. She hopes taht NOrth Korea will show compassion upon her two sisters and set them free.
What do you think?
Should these two women have been detained for three months?
Do you think that North Korea will act compassionately adn set them free?
What if anything can be done?