If it was strictly a decapitation attack there probably wouldn't be multiple sites involved. They're claiming four states were targeted.
As you say, this check has been in the mail for a while, so how are vulernable helicopters flying over caracas without any resistance? One dude with a MANPADS could take them down.
Decapitation is also the only aparent strategic goal of this operation, so it's hardly far fetched to suggest they going for 'one and done'.
Anyway, beers on me if I'm wrong :)
Presumably there are SF and/or airborne units executing coordinated strikes on the ground right now. Most likely the 160th, as they were deployed there last I checked.