How about a dozen strategic nukes (I'm talking the big ones)...but...if we most go non-nuclear, we can bring back B-52 carpet bombings from the bad...good ole days...
If I was Pres for 5 minutes ........ I'd order one of the LA class subs docked in Norfolk to load their tubes with some conventional firecrackers - and point them at NK and Iran - then let 'em fly.
By taking out a few nuclear sites on two countries at the same time ....... ?
I think that would pretty much say what needs to be said.