The US is basically one big unhardened underbelly.

The US puts most of its effort into creating the appearance of strength rather than strength itself, and its been baked into the military doctrine since the 1950/60s with Korea. Copaganda (shows like 24 or Cops), the Military-Industrial-Film complex (Top gun, too many movies to list), comic book movies (good guys have to always do the more “moral” thing), the shock and awe doctrine; you can genuinely attach the US’s security posture almost directly to one guy: Robert McNamara. This idea of creating the appearance of the thing being as effective as the thing is fundamental to US hegemony, and its currently falling apart. The man behind the curtain was never meant to be revealed because the theatrics were supposed to be so impressive you would never even consider trying to reveal them.

Take a look at Russias invasion of Ukraine, and consider the implications of what it means to have un-hardened infrastructure. Now the US continues to believe itself to be invulnerable in this regard, but consider, what would be the implications of an oil pipeline disruption at this current moment? Trump brags about how the US is relatively secure in regards to oil production, twice as much as the next blah blah blah.

Those pipelines run for hundreds of miles basically defenseless.