The United States continues to closely monitor the North Korean nuclear program and calls upon North Korea to honor its international obligations.

WSJ: U.S. Says North Korea May Have Nuclear Missile

In fact, as former assistant secretary of defense Frank Gaffney points out, the North Korean nuclear program reached its frantic climactic stage precisely during the current American moratorium on nuclear testing.

CENTERFORSECURITYPOLICY: Test-Ban Trap

Successive U.S. administrations dating back to the Clinton White House have struck deals with North Korea that traded financial assistance, food and power generators for North Korean promises to shut down its nuclear program.

WSJ: U.S. Fortifies Hawaii to Meet Threat From Korea

U.N. diplomats said measures could include new asset freezes on North Korean companies believed to be involved in the country's nuclear program.

WSJ: U.S. Tries to Line Up U.N. Rebuke