alt Hacker NewsThe US strongly avoids foreign content for this reason. This policy is often the only thing keeping domestic commodity component manufacturing afloat. This is also the main reason Micron is getting a subsidized fab.
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The sheer quantity of "mislabelled"[1] PRC origin parts passing through the logistics chains as Primo-A-grade-American-Made - even in Defense - is deeply disturbing, and that's the stuff that they do catch.
Transshipment is the elephant in the room here - smaller components made in PRC, then shipped to wherever as Raw Materials (tm), and then put in a "friendly nation" box and sold as safe.
DoD's DMEA and DLA CD programs, plus GIDEP reporting, capture confirmed cases . . but not the miss rate. On the occasion they do bust open a jet (or god forbid a missile) and look at all the bits with a microscope, it can be scary.
[1] They like to avoid the more precise "criminal fraud"
Stuff like https://www.hadrian.co/ is pretty neat, but the whole "electric stack" is hopelessly Chinese from this perspective- batteries, motors, all kinds of small and crucial electrical things- and critical minerals, like Gallium for radar.