A radiation leak at a nuclear waste storage site below the New Mexico desert has been plugged, but the facility will remain closed for at least the next three weeks, officials said late Thursday.
Reaction to new nuclear deal is mixed in Washington.
North Korea amplified its threatening rhetoric as the U.N. Security Council approved new sweeping sanctions, vowing to launch a first-strike nuclear attack against the United States and threatening to engulf Washington in a "sea of fire."
North Korea declared Tuesday that it had carried out a test of a nuclear bomb after the detonation was detected by the U.S. Geological Survey.
SEOUL - North Korea said on Thursday it would carry out further rocket launches and a nuclear test that would target the United States, dramatically stepping up its threats against a country it called its "enemy".
North Korea vowed to boost its nuclear capabilities on Wednesday after the United Nations Security Council unanimously passed a resolution condemning its controversial rocket launch last December.