United States threatened the DPRK to return to a "black list".

SyuzhetyPovtornye nuclear tests in KNDR01.06.2009Severnaya Korea is preparing to launch long-range deystviyaGossekretar United States, Hillary Clinton is not excluded that after the recent nuclear test North Korea will be returned to the "black list" of countries - associates terrorism. This statement is the head of the State Department made the broadcast ABC News.
In the weekly show Stefnaopulosa George Clinton, said that experts from the State Department is now begun to search for evidence that the DPRK continues to support international terrorist organizations. Secretary of State added that it could not say anything certain about the outcome of the investigation.
Recall that after the nuclear tests by Pyongyang in late May and the subsequent launch of short-range group of senators called for U.S. President Barack Obama with a letter, which contained a proposal to return the DPRK on the list of countries - and supporters of terrorism to tighten the sanctions earlier softened. These tests also led to condemnation and concern UN Security Council.
North Korea has been excluded from the "black list" in October 2008, even during the presidency of George W. Bush 's predecessor, Obama. To this end, North Korea had to promise to allow international inspectors to nuclear facilities.