[lmm]

Compatibility usually gains you more than you lose. If you can't make US planes with parts from the rest of the world then that does mean other countries can't make US planes, but that also means that the US manufacturers can't import parts from elsewhere.

[dotancohen]

The F-35 has components made all over the world, but was designed in the US. Is that plane metric?

[lmm]

I would assume/hope so? Lockheed of all companies should be on top of that after the mars probe incident.