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FILE - This combination of file photos shows North Korean leader Kim Jong Un, left, on May 10, 2016, in Pyongyang, North Korea, and Kim Jong Nam, right, exiled half brother of Kim Jong Un, in Narita, Japan, on May 4, 2001. South Korea’s spy agency believes that Kim Jong Nam was assassinated this week in a Malaysian airport as part of a five-year plot by　Kim Jong Un to kill a brother he reportedly never met. If this is right, the motive likely has more to do with their shared bloodlines - and that volcano - than any specific transgression. (AP Photos/Wong Maye-E, Shizuo Kambayashi, File) (AP)

How a North Korean mountain and myth may have inspired murder

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FILE - In this Oct. 16, 2016, file photo, a man watches a TV news program showing a file image of a missile launch conducted by North Korea, at the Seoul Railway Station in Seoul, South Korea. U.S. President-elect Donald Trump took to Twitter on Tuesday, Jan. 3, 2017, to vow that North Korea’s push to develop a nuclear weapon capable of reaching parts of the United States “won’t happen.” It may already have. The letters read "North attempted to fire a mid-range Musudan missile in June." (AP Photo/Ahn Young-joon, File) (AP)

Donald Trump may not fully understand North Korea’s nuclear program

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