Tim seaman has the night off .
North korea launches a missile over japan tonight.
It comes just hours after the rogue nation-- threatened to "sink" japan and reduce the u-s mainland into-- "ash and darkness."
Abc's emily rau has our-- top story.
" " it's the second time in a month that north korea has launched a missile over japanese airspace.
Vo: news reports there saying it passed over the northern part of the country at 7:06 a.m.
Soon after- alerts sent out by the government?.
Alarms sounding off to warn people to take cover.
Nats sirens this american in japan saying those sirens woke him up.
No word on what type of missile this may have been.
North korea last launched a ballistic missile on august 29th..
Then the big h- bomb test on september 3rd.
Rau on cam tag just this week the u-n passed a new wave of sanctions on north korea.
Tonight the white house is saying president trump has been briefed about