Technically speaking the war (which also technically speaking wasn't a war) never really ended.
We've been doing annual joint military exercises for decades (Ulchi Focus lens, Team Spirit and now Foal Eagle) for decades. We're not exactly covering anything up.
Regardless of who strikes first, casualties in the south will be massive. Granted, the capabilities of the north to hammer Seoul with artillery is a bit overstated but as dev/null noted the first 24-48 hours alone would see millions in casualties. Not to mention the humanitarian crisis that would quickly follow.
I hope we don't see armed conflict over there, but it's always been on the verge.
Edit: foal autocorrected to "dial"