United States questioned the nuclear tests by North Korea.

Press konferentsiiVladimir Hrustalev29.05.2009Chem North Korea threatens the peace? SyuzhetyPovtornye nuclear tests in KNDR29.05.2009Severnaya Korea launched a seventh raketuAmerikanskie experts expressed doubts that North Korea conducted a nuclear test, reports Reuters with reference to the representative of the U.S. authorities who wanted to remain anonymous.
As the AFP, a study of air samples from the presumptive tests, as well as analysis of other factors did not allow the experts to make a definite conclusion. Source Agency said tests did not reveal anything that would confirm a nuclear explosion of a charge. "
Sobesednik agency added that while the experts have only preliminary data analysis, and with the certainty of research results can be said only after some time, when all tests are completed.
Remember, the DPRK conducted a nuclear test May 25, 2009 at an underground firing range near the town of Kilchzhu. The first of the South Korean government said: seismologists recorded the "artificial" earthquake average force coincided with the alleged test. Later on the successful nuclear test Pyongyang officially announced.
According to the Ministry of Defense of Russia, the power of nuclear devices ranged from 10 to 20 kilotons, but independent experts have assessed the power of the bomb at approximately 4 kilotonnes on the basis of seismic performance.
Following the bombing of North Korea launched several short-range missiles, but also made a dramatic statement of withdrawal from the armistice of 1953, which ended the Korean War.
At an emergency meeting held on 25 May in New York, the UN Security Council sharply condemned the DPRK's nuclear test and announced the preparation of the resolution. At the last meeting of the Security Council on 28 May had been submitted the new draft resolution, which is still unknown.