Nearly three weeks after North Korean leader Kim Jong-un's no-show at a key event sparked rumours he was seriously ill or even dead, state media published photos on Saturday showing him in public.
Mr Kim's conspicuous absence from the 15 April celebrations for the birthday of his grandfather, the North's founder, sparked feverish speculation over his health and who would replace him at the helm of the nuclear-armed country.
It is not the first time Mr Kim has disappeared from public view. In 2014, he dropped out of sight for nearly six weeks before reappearing with a cane. Days later, South Korea's spy agency said he had undergone surgery to remove a cyst from his ankle.
Here is a look at why Mr Kim's health has been the subject of so much conjecture.
Kim Jong-un cutting a ribbon at what is reportedly his first public appearance in 20 days. Source: KCNA
Who is his successor?
Mr Kim has been in power for nearly a decade and his death would have left Pyongyang facing an unplanned succession for the first time in its history.
Leadership has always been a family affair in the isolated North, dominated by the members of the "Paektu bloodline" - a Northern term for the country's founder Kim Il Sung and his descendants.
Mr Kim's three known children are still very young and there is no designated successor as far as the world is aware.
His younger sister Yo Jong - one of his closest advisers - is widely regarded as the top contender to succeed him but the North is a highly patriarchal society where seniority and gender both carry weight.
What happens to nuclear talks?
Mr Kim is known in the North as the Supreme Leader and his authority spans the ruling Workers' Party and the military. All major decisions require his approval.
His disappearance from public view came as Pyongyang's talks with Washington over the North's nuclear arsenal are at a standstill, despite three meetings between Mr Kim and US President Donald Trump.
If Mr Kim were incapacitated or dead, it would have increased uncertainty over the process.
Analysts also say it could have led to a chaotic power struggle and triggered an exodus of refugees into China - something the North's diplomatic backer and main trading partner Beijing has long feared.
Nuclear talks with the United States and President Donald Trump have reached a standstill in recent months. Source: AAP
"Kim's personal profile, family history, and the structure of the North Korean regime make his health a major variable for the country's stability and foreign policy," Leif-Eric Easley, a professor at Ewha University in Seoul, told AFP.
Why the rumours?
North Korea is an unusually opaque country, where even economic growth figures are treated as a state secret.
Observers and even diplomats in Pyongyang rely heavily on the closely controlled state media for hints of what is going on.
Secrecy is strictest of all around the leadership and the absence of information creates ample room for speculation to flourish unchecked.
Mr Kim was last seen presiding over a ruling party meeting on 11 April. But four days later he missed the celebrations for the birthday of his grandfather - the most important date in the North's political calendar - sparking questions over his whereabouts.
Daily NK, a South Korea-based outlet run mostly by North Korean defectors, reported Mr Kim had undergone a cardiovascular procedure and was recovering at a villa in North Pyongan province.
Soon after CNN reported that Washington was "monitoring intelligence" that Mr Kim was in "grave danger" after undergoing surgery, quoting an anonymous US official.
A Japanese report even said he was in a "vegetative state".
But a top security adviser to South Korea's president later told the broadcaster Mr Kim was "alive and well". Mr Trump also downplayed reports of Mr Kim's poor health and possible demise.
"This incident is a reminder of how vulnerable we remain to groundless rumours about North Korea," former US government North Korea analyst Rachel Lee told AFP.
"We need more experts who can analyse North Korea using solid tradecraft."
Analysts say Mr Kim is likely to make another public appearance in the coming days that will be reported by state media.
But an official explanation for his absence is unlikely.
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