Tellingly, they refer to them as "dagger knives" and (if my trip goes well), I never need to stab anything in the backcountry.
But the superior idea of compositing a thin metal edge with a carbon-fiber handle is interesting. As with many other male-type-persons, I wondered if I'd been on a 9-11 plane, what would have and could have I done? (P.S., in truth, diddly-squat, because no one but those on the PA plane realized the seriousness.) But in those fantasies, I imagined a short sword utilizing razor-blade inserts embedded in a composite handle (carbon-fiber, fiberglass, using epoxy, JB Weld, etc). Easy to build at any Home Depot, but could you source everything in an airport departure lounge? That would make a heck of a cheese- or flesh-slicer, but not a wood-chopper. You'd want a metal skin on a composite core.
Well, there's another DIY project in the queue - The sub-ounce, wood-splitting shiv. I'm gonna have to take the vacuum-bagging plunge some day soon and up my at-home composite capabilities.