Singing soldiers and flower shows marked the birthday of the man dubbed North Korea's "invincible brilliant commander" by state media, as regional powers wondered whether he would abide by a nuclear deal.

The communist world's first dynastic leader, Kim Jong-il, 65, is the unchallenged head of the reclusive state whose economy has fallen deeper into poverty during his years in power.

North Korea reached a deal earlier this week to shut down its sole nuclear reactor in exchange for energy aid as well as other economic and diplomatic incentives if Mr Kim decides to scrap his country's nuclear arms programme.

"I find it difficult to believe that this is a strategic decision to dismantle its nukes. I see this as a tactical way of getting the heat off, getting concessions and keeping the Chinese happy," said Michael Breen, Seoul-based consultant and author of Kim Jong-il: North Korea's Dear Leader.

With nuclear weapons, impoverished North Korea gets a seat at the table with global powers including the United States - the nation it argues is trying to topple it and causes it to sacrifice so much to maintain its 1.2-million man military.

Without nuclear arms, North Korea is just a poor country with failed economic policies, analysts said.

Mr Kim's main priority is to stay in power and his media has credited him with forcing the US to make concessions through the nuclear agreement.

He is seen as a deity at home, where thousands danced in the streets of Pyongyang yesterday to mark his 65th birthday and the military hosted a gala, performing song and dance numbers for tunes such as "My Happiness is in the Bosom of the Respected General".

Outside of North Korea Mr Kim is seen as man with a bouffant hair-do, drab jumpsuit and platform shoes who has done little to help his starving people and let the country's industry stagnate.

Like his father, he has constructed a cult of personality around him.

Long groomed by his father, state founder Kim Il-sung, he gradually tightened his hold on power after the elder Kim died of a heart attack in 1994 in the midst of an earlier crisis over North Korea's nuclear programme.

The younger Kim declined to assume the title of President, instead designating his father "eternal president" and opting to rule as chairman of the National Defence Commission and head of the ruling party.

North Korea's official media has said flowers come into bloom when he appears and rainbows fill the sky on his birthday.

He is, it is said, a man who pilots jet fighters - even though he travels by land for his infrequent trips abroad.

He has also penned operas, produced movies and accomplished a feat unmatched in the annals of professional golf, shooting 11 holes-in-one during the first round he ever played.

"Your birth as a bright star over Mount Paektu was the greatest event as it promised the happiness and prosperity of the Korean nation," official media said.

The amazing Kim Jong-il

The following are reports from official North Korean sources about some of Mr Kim's acclaimed abilities and attributes:

The weather
For previous birthdays, North Korean official media have reported on the "Wonders of the February holiday" that included sunrises so brilliant, frost exploded with the sound of firecrackers, rainbows appeared and frozen lakes thawed with such a noise that it caused mountains to shake.

Recent hits
Mr Kim is blessed with a photographic memory. He impressed one funeral gathering by walking among hundreds of tombstones and recounting the achievements, characteristics, tastes and bereaved family members of the dead he passed.

Kim's relentless push to advance the communist movement in the state has turned him into something of an insomniac. Kim was quoted as saying he has never had a night of comfortable sleep because of the days and months he spends giving field guidance to factory workers, farmers and troops.

He does manage to take short naps in the car.

The start
Although South Korean and foreign analysts say Mr Kim was born in the Soviet Union, official media say he was born at a secret revolutionary camp on Mount Paektu, a northern mountain on the Korean peninsula that many Koreans consider sacred.

A double rainbow appeared over the mountain when he was born.

Accomplished young man
According to his official biography, Mr Kim helped develop North Korea's TV broadcasting industry.

He wrote a thesis on Korean history. He penned operas and plays - all before turning 23.

The artist
Mr Kim was responsible for placing museums in all corners of the country. He developed an actors' studio. In 1967, he brought the feature film Five Guerrilla Brothers to the screen. That movie was followed by The Sea of Blood and other movies, including several award-winning films.

The engineer
Mr Kim's engineering expertise runs deep in the operation of hydroelectric power stations, cutting-edge design in computer circuits, the construction of floodgates and irrigation canals.

"His profound knowledge in electronic engineering made the scientists listening drop their heads in humble respect," official media said.

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