In this May 21, 1987, file photo, then North Korean President Kim Il-sung, center, and then Chinese Premier Zhao Ziyang make their way through a crowd of well-wishers at the train station in Beijing. North Korean leader Kim Jong Un’s two-week absence from public view has inspired speculation and rumors, but past disappearances of North Korea's ruling elite frequently have simply shown the disconnect between insatiable curiosity about the country and the secrecy surrounding its leadership. (AP Photo/Neal Ulevich, File)
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