Arms control experts have said the images of the missile suggest it's big enough to carry multiple warheads, or perhaps a large thermonuclear one, but it's unclear if the ICBM is actually just for show since there's no indication it's been tested.
Kim oversaw the parade, which is part of festivities meant to mark the 75th anniversary of North Korea's ruling Workers' Party of Korea.
North Korea revealed Saturday what appears to be its biggest intercontinental ballistic missile to date, but analysts say the isolated nation is unlikely to test the device any time soon.
It's also not immediately known if leader Kim Jong-un attended the event and what kinds of weapons were revealed.
Dressed in a Western-style gray suit and tie, Kim repeatedly appeared to cry while delivering a speech to thousands of cheering, maskless attendees packed tightly into Pyongyang's central Kim Il Sung Square.
Kim also thanked the citizens of North Korea for their efforts in fighting the COVID-19 pandemic, and repeated the claim that the country has not had a single positive case.
South Korean and US intelligence authorities are analyzing the movementsincluding the possibility that it could be the actual event, not a rehearsal.
North Korean leader Kim Jong Un addressed an unusual pre-dawn military parade in Pyongyang to mark the 75th anniversary of the founding of its ruling Workers' Party on October 10, according to a footage aired on state television.
Xi said he was "greatly pleased" with the achievements that North Korea had made in recent years by engaging with foreign countries in the face of hardships and challenges, KCNA reported.
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The parade was staged in the early hours of Saturday morning local time, but not broadcast by state media until the evening.
Last month, troops from the North shot dead a South Korean fisheries official who had drifted into its waters, apparently as a precaution against the disease, prompting fury in Seoul and a rare apology from Kim.
Some sort of display of new weaponry - which experts believe could serve as leverage in future nuclear negotiations - was expected, as Kim had promised late previous year to unveil a new strategic addition to the nation's arsenal.
Kim said he hopes that North and South Korea will join hands again after the coronavirus crisis is over.
Indeed, in a speech at the parade, Kim promised to boost military power, but said the country would not use it unless it was threatened.
But unlike on many previous occasions, no worldwide media were allowed in to watch the parade, and with many foreign embassies in Pyongyang closing their doors in the face of coronavirus restrictions, few outside observers were left in the city.
An unnamed US official reportedly told The Daily Caller, "The United States remains guided by the vision President Trump and Chairman Kim set forth in Singapore and calls on the DPRK to engage in sustained and substantive negotiations to achieve complete denuclearization".
Foreign diplomats in Pyongyang have often been invited to observe past celebrations.
But there hasn't been much to celebrate lately as Kim struggles to keep afloat an economy crippled by years of stringent USA -led sanctions over his nuclear program and ravaged further this year by border closures amid the COVID-19 pandemic and devastating summer floods and typhoons that will likely worsen chronic food shortages.