South Korean media had said the dictatorial regime in north was planning another test in the Punggye-ri area.
US secretary of state's visit seen as a show of solidarity with American ally.
Congress seen as an attempt by Kim Jong-un to tighten grip on power.
US undertaking military exercise with South Korea when carrier buzzed by Russian Tu-142 bombers.
Black market behind North Korea's flourishing economy.
Majority of North Korean workers are held in China and Russia, and work up to 20 hours a day.
Incident took place when Seoul's naval personnel were on the lookout for illegal Chinese fishing vessels.
The attack was tied to the film The Interview, which depicted the fictional assassination of North Korean leader Kim Jong-un.
South Koreans crossed the border with North Korea to meet family members they had not seen in 65 years.
Pyongyang reacts to Barack Obama-Park Geun-hye statement.
North Korea defector and human rights activist Yeonmi Park describes her escape to South Korea.
The gala was held the day after holding a massive military parade overseen by leader Kim Jong-un.
Yeonmi Park, who fled North Korean as a 13-year-old, has said that the dictator has complete control over the country.
North Korean's leader threaten the US with his country's military during an anniversary parade.
Rogue nation held a parade to mark the 70th birthday of its ruling Workers' Party of Korea.
Communist state celebrating 70th anniversary of its ruling Workers' party.
Smartphones, traffic jams, restaurants and taxis – North Korea's capital is showing signs of prosperity.
Pyongyang to hold one of the biggest military parades in recent times to mark 70th anniversary of Workers' Party of Korea.
Admiral Bill Gortney says US military ready to respond in the event of nuclear launch.
South Korean national Joo Won-moon to be received by Seoul at truce village of Panmunjom.
Pyongyang's envoy to London says regime will go ahead with controversial plans to launch satellites.
The cartoon compares oranges from Israel to Nazi German pizza and macaroni from North Korea.