Kim Jong Un's family has ruled North Korea for three generations, since 1948.
North Korea's latest threat to target Guam prompted this reaction overnight from the governor of the U.S. territory. "I want to reassure the people of Guam that currently there is no threat to our island," Gov. Eddie Baza Calvo said.
President Donald Trump earlier said to North Korea, "They will be met with fire, fury and frankly power, the likes of which this world has never seen before."