Kim Jong-un and his grandfather Kim Il-sung. Korea Times file, AFP

Kim Il-sung, founder of North Korea and grandfather of its incumbent leader Kim Jong-un, waves to a cheering crowd during his visit to Vietnam in November 1958. Korea Times file

Kim Jong-un waves after arriving at Dong Dang Railway Station on Tuesday to start his visit to Vietnam for the U.S.-North Korea summit in Hanoi. During his stay that continues through March 2, the younger Kim is expected to mimic aspects of his grandfather's trip by traveling to some of the locations the elder Kim visited. AFP

Kim Il-sung acknowledges the crowd from an open car during a welcoming street parade in Hanoi in 1958. Korea Times file

Kim Jong-un waves from a luxury sedan at Dong Dang Railway Station on Tuesday. Yonhap

Kim Il-sung walks side by side with his Vietnamese counterpart Ho Chi Minh in Vietnam in 1958. Korea Times file

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Kim Jong-un leaves Dong Dang Railway Station on Tuesday. Yonhap

Kim Il-sung, right, aboard a ferry during a visit to Vietnam's Ha Long Bay in 1964. Korea Times file

Kim Il-sung visits a military museum in Hanoi in 1958. Korea Times file

In this photo released by North Korea's state media on Nov. 26, 2013, Kim Il-sung shakes hands with Vietnamese leader Ho Chi Minh at an unidentified location. The framed photo reportedly hangs at a kindergarten in Pyongyang, North Korea's capital. Yonhap