Indeed, Rigga. Also, consider this:
http://graphics.latimes.com/missile-defense-jlens/
JLENS has eaten $2.7 billion - almost 30 times the sum that LJ is mad about - in two decades of accomplishing not very much. Oddly enough, it exists because the Army, in the early 1990s, was given control of "joint" defense against low-altitude targets, chiefly cruise missiles - and promptly killed off a Navy program based on an airship with Cardington genes.
Clearly the Army thought the airship was a waste of time and that a tethered aerostat would be snake-oil-free...