North Korean leader's younger sister Kim Yo Jong seen as the most likely candidate to succeed her brother, but collective leadership also seen as possibility

South Korean government looking into CNN report, which cited anonymous US official

Launches come 2 days after Pyongyang says Kim Jong Un supervised an artillery drill aimed at testing the combat readiness of units in front-line and eastern areas

US president's supporters say the real estate tycoon brings a fresh approach to intractable problems, but critics fret that his wildcard strategy may lead to devastating results

Comments come after Pyongyang gave US New Year's deadline to offer fresh concessions amid stalled negotiations

Kim Jong Un has threatened to take unspecified action if sanctions are not eased by year's end; speculation has centered on possibility of nuclear warhead test

Pyongyang lashes out at US president after he warns that Kim Jong Un has everything to lose if he resumes hostile acts

Satellite image reportedly shows Pyongyang preparing to resume testing engines at launch facility partially dismantled in denuclearization agreement

After nuclear talks break down and Trump revives his nickname for Kim Jong Un, Pyongyang threatens to return in kind and resume insults

Diplomat accuses Washington of making proposals aimed at buying time without offering real solutions as Pyongyang end of year deadline for mutually acceptable terms approaches