South Korean Foreign Minister Yun Byung-se and U.S. Secretary of State John Kerry hold a joint news conference following meetings at the Ministry of Foreign Affairs in Seoul. Saul Loeb/AFP/Getty Images hide caption

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A man watches a television showing news coverage of the reported execution of North Korea's defense minister, Hyon Yong Chol, at a railway station in Seoul on Wednesday. Ed Jones/AFP/Getty Images hide caption

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An image obtained by Yonhap News Agency showing North Korean leader Kim Jong Un pointing at a ballistic missile believed to have been launched from underwater near Sinpo, on the northeast coast of North Korea, on Saturday. KCNA/EPA/Landov hide caption

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North Korean defector Shin Dong-hyuk came to prominence in a 2012 book about his life in a North Korean prisoner camp. He now says some key parts of his story were not true. His case highlights the difficulty in confirming information in a closed society like North Korea. Chip Somodevilla/Getty Images hide caption

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Amid much speculation by private security analysts, the FBI stood by its claim this week that North Korea was responsible for the hack against Sony Pictures. Damian Dovarganes/AP hide caption

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People watch a TV news program showing Kim Yo Jong, North Korean leader Kim Jong Un's younger sister, at Seoul Railway Station in Seoul, South Korea, in November. She has reportedly married the son of the ruling party secretary. Ahn Young-joon/AP hide caption

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The Interview is now Sony's top online movie. It earned $15 million through rentals and sales, the studio said. It pulled in almost another $3 million from theater screenings. Jim Ruymen/UPI/Landov hide caption

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The toxic ingredients of a cyberattack like the one North Korea is accused of unleashing on Sony Pictures are available in underground markets. Damian Dovarganes/AP hide caption

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The Alamo Drafthouse theater chain will show The Interview starting on Christmas Day. Paul J. Richards/AFP/Getty Images hide caption

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