Air Force and OSD Seeking to Define "Energy Security"

This project seems to be at the early stages, but I believe it's potentially very valuable to the Department. What is energy security? It sounds dumb, but why do you need it?  What goes wrong when you don't have it? 

For me it's a direction and not a destination that can ever be reached, certainly not on a national level. But what types of things can DOD do to increase its energy security? Not to get all French on you, but the answers to that question are the raison d'etre of this blog.

So here's some of the early discussion led by Air Force energy executive Mike Aimone, with reference to an earlier definition by OSD. I'd be happy to hear your definitions and will certainly pass them on to the right folks.