South Korea test-fires a new ballistic missile with a range of 500 kilometres and hopes to extend its range to 800 kilometres so that it can reach anywhere in North Korea.
The President of the United States Barack Obama freezes the assets of three North Korean organisations and one individual in response to the sinking of a South Korean warship in March. North Korea has denied it is responsible.
Increased tensions over the sinking of the South Korean warship ROKS Cheonan (PCC-772): South Korea begins broadcasting propaganda over its border with North Korea. North Korea severs all ties and communications with the South and expels Southern workers from a jointly-run factory above the border.