BBC News
Just came up on the BBC.
North Korea was founded Sept. 9, 1948. Leader Kim Jong Il uses the occasion to stage performances and other events to bolster loyalty among the impoverished North Korean population.
Experts have speculated that North Korea might use a major anniversary to conduct a nuclear-related test, though there was no immediate indication that Thursday's reported explosion was linked to Pyongyang's efforts to develop nuclear weapons.

Original Source WASHINGTON - The US intelligence community is in the grip of an internal debate on whether new data on North Korea should be interpreted as a sign the country is preparing for its first nuclear weapons test, US administration officials said late Saturday.
A nuclear test by North Korea ahead of a US presidential election could deal a severe blow to President George W. Bush’s strategy of diplomatic containment of the Stalinist state that has openly bragged about its nuclear ambitions.