I see that we haven't got a war in Korea.
Stuff like this over a disputed border is always prone to get out of hand. The side doing the exercise feels it has to show that has to freely operate in all of its "territory", the other side feels that it can't let the other get away with it. It's really a case of ego writ large - and sadly often writ in blood.
I still feel the Rubicon has been crossed here. Any further DPRK attack on South Korea is going to trigger something very large indeed. Probably best to not give the regime an "excuse" for a few months.
That is my 400th post. I'll do something bigger when I hit the big D.