Don’t want to start an indepth conversation or flaming war, but: How does, what is effectively the worlds largest logistics organisation (the US Military), still require other companies (‘small South Carolina parts suppliers’) to transport a couple of screws across the other side of the world?

Why the hell can’t they do it themselves? If they can move millions of tonnes of war machinery across the world at a moments notice, why the hell can’t they transport a washer the same distance? I don’t get it.