North Korea has threatened the United States with a preemptive nuclear attack. The threat came hours before the United Nations Security Council approved tougher sanctions against the regime. North Korea is not believed to have the capability the launch such a strike. Sally Kidd is in Washington with the latest.
The underwater drone scanning for traces of Malaysia Airlines Flight 370 should complete its task in the zone under scrutiny within a week as the search for the plane intensifies, a government official said Saturday -- day 43 of the effort.