Following the national security argument to a logical, if admittedly extreme conclusion, that is where you might end up.
Assuming that is unrealistic, what is a workable solution?
1. Western countries/western cameras, Eastern countries/eastern cameras
2. Allied countries/allied cameras
3. No cameras from foreign government owned companies
4. No cameras from foreign government owned companies in non-allied countries
5. Open or reviewed source firmware cameras only
6. Other?