On April 15, which marks the birth anniversary of the founder and former President Kim II-Sung, North Korea showcased its military strength during a parade held in capital Pyongyang.
April 15 is observed as the Day of the Sun or Sun's Day in North Korea, which is a public holiday.
But not all was well on the Sun's Day, as tension escalated between US and North Korea.
In an exclusive coverage of Sun's Day, which is an auspicious day for the North Koreans, CNN's International Correspondent Will Ripley reported, "We saw a submarine launch ballistic missiles, we saw missiles that are capable of being launched from a mobile launcher and just seconds before we came on the air we saw these very large what are believed to be intercontinental ballistic missiles."
The video telecast on state television showed images of thousands of soldiers marching beside tanks, balloons and a huge crowd. A happy Kim Jong-un was seen clapping at the parade. In one shot, the soldiers were shown directing a chant towards Jong-un, shouting, "We will die for you!"
The celebrations included cultural performances and military display. People of all age groups were seen celebrating this day with fervour. Thousands of citizens came on the streets of the capital to observe the birth anniversary of Kim Il-Sung, who was the grandfather of Kim Jong-un. Kim II-Sung was born in 1912.
However, this year's annual holiday celebrations were held in a tense atmosphere the US deployed warship in Korean peninsula.
Reacting to US deployment of war ships in the region, North Korean state media was heard warning that such "reckless acts of aggression" would be countered with "whatever methods the US wants to take."
North Korea's Vice Minister for foreign affairs Han Song Ryol accused Trump of building up a "vicious cycle" of tensions in the Korean peninsula and pointed to Trump's "aggressive tweets."
Ryol blamed the US and its President Donald Trump for growing tensions between the two countries. Comparing Trump with the former administration under Barack Obama, Han said the present administration is "more vicious and more aggressive" than the previous one under Obama.
The military too said that if the country was attacked, it would target US bases and "headquarters of evils."
Citing military exercises with South Korea and the deployment of a US aircraft carrier in the peninsula, Han warned US that Pyongyang would "go to war if US will choose it" and ominously vowed to continue building nuclear arms.
As tensions build up, Choe Ryong Hae, a senior member of Workers' Party of Korea (WPK) gave an ominous threat during the military parade.
"If the US does any reckless provocation, we will immediately apply a destructive strike with our revolutionary power. We're prepared to respond to an all-out war with an all-out war and we are ready to hit back with nuclear attacks with our own style against any nuclear attacks."
The conflict between US and North Korea has raised fears among the international community. Meanwhile, China has urged both the countries to take steps to deter and prevent a situation that would take the Korean peninsula down to "an irreversible route".
China's official news agency Xinhua said, "If a war occurs, the result is a situation in which everybody loses and there can be no winner. It is not the one who espouses harsher rhetoric or raises a bigger fist that will win."