It's a good premise for entertainment and to scare kids.
'Overwhelming' the defenses of the USA is just not possible by any combination of adversaries on this planet.
The limiting factor of an AWACS guided F-15 is how many missiles it can carry ..with AWACS tracking the Eagle doesn't even have to turn on it's radar.
..and that was back in the '70's.. and that is just one single weapon system.
'Sneakin' the troop planes in disquised as commercial airliners ...another great premise for entertainment .. good luck with *that* ..not sayin a dedicated very high roller adversary could'nt try it .. just sayin the tactic would have more than a few problems to overcome ..not the least of them being big, fat, and slow ..and forget about low altitude drops anywhere near a hawk battery
..and even the Guard has tons of 'em.
-GE aka Frank (and they can turn on, lock on, and launch pretty damn fast