After they picked the sign, inked the contracts and committed the money==then they "find out" it's a Federal highway and they can't take Panasonic's money??? Just a thought, though--- If you are on a highway that dead ends at an airport and these honking big mountains are off to your west, do you really need a multi-million dollar blinking sign that tells you you're coming up on the Denver International Airport??  If you do, maybe you shouldn't be out on the road without an attendant, or a guard.  Even you know who would know he wasn't in Miami.