Pope Francis arrives in South Korea

Pope Francis arrives at Seoul military airport on August 14, 2014 in Seoul, South Korea. Pope Francis is visiting South Korea from August 14 to August 18. This trip is the third trip abroad for the pope following Brazil and the Middle East. This is the third pontifical visit to South Korea. (Photo by Song Kyung-Seok-Pool/Getty Images)

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    Pope Francis arrives in South Korea

CNN's Paula Hancocks explains the main reasons for Pope Francis' visit to South Korea.