Carney: North Korea’s threats ‘achieve nothing’

The North Korean declaration came as the United States and South Korea launched two months of joint military drills, partially prompted by North Korea's decision to test a nuclear weapon last month.

Last week the United Nations Security Council voted unanimously to impose new sanctions against the communist nation as a punishment for its nuclear test.

"We continue to urge the North Korean leadership to heed President Obama's call to choose the path of peace and come into compliance with its international obligations," Carney said. "You know, we have worked in a concerted way with our international partners to put pressure on and isolate North Korea because of its failure to live up to its obligations."

For more on Carney's comments, click here.