Obama extended the trade sanctions against the DPRK.

U.S. President Barack Obama on Wednesday extended the term of the some trade sanctions against North Korea, using the extraordinary powers the head of state, reported Agence France-Presse.
This, in particular, the restrictions relating to any dealings with the property. The validity of these sanctions to expire on Friday, June 26. In accordance with the decision, Obama sanctions against Pyongyang will operate one more year.
As indicated in the statement of the American President, the decision to extend the sanctions was taken in connection with the risk of accumulation of North Korea's nuclear material that poses a threat to public security of the United States and contrary to the purposes and objectives of U.S. foreign policy.
In 2008, like AFP, former U.S. President George W. Bush has removed Pyongyang from a list of supporters of terrorism and North Korea withdrew all economic sanctions with the exception of restrictions on transactions involving property. It is the validity of these restrictions extended June 24, Barack Obama.
The conflict over North Korea escalated after the May 25, 2009 Pyongyang conducted a second in the history of underground nuclear tests, and also carried out several missile launches small and medium-range.
In response, on 12 June the UN Security Council imposed new sanctions against Pyongyang, which prohibit, among other things, the export of arms from North Korea. West urged the DPRK to halt its nuclear program and return to the negotiating table, but Pyongyang continues to nuclear development and threatens the world community with new launches and tests.
June 24, the North Korean government информагентство issued a statement in which Pyongyang reported that destroy the United States, if the "American imperialists" razvyazhut a new war. Earlier, Japanese intelligence warned that North Korea will soon make a new launch rockets, one of which could be directed towards the American state of Hawaii.