Check out how many years KJU's father ruled! And "heart attacks can be deadly"!
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In a statement read by a tearful television announcer that was repeated by other state-run media, North Korea said Kim Jong-il had died of a heart attack while on his train, as he was conducting an “onsite guidance tour” in an unspecified part of the country. The statement said:
“We took every emergency measure we could, but the great leader passed away.” His death ended 17 years of rule over the isolated, paranoid country that his father, Kim Il-sung, founded.
https://www.nytimes.com/2011/12/19/world/asia/kim-jong-il-is-dead.html