[alienasa]

> Does the FAA have worldwide jurisdiction over launches by/for USA companies?

Yes it does. Per https://www.faa.gov/newsroom/commercial-space-transportation... "An FAA license is required for any launch or reentry, or the operation of any launch or reentry site, by U.S. citizens anywhere in the world, or by any individual or entity within the U.S. "

[snovv_crash]

So the FAA might object, but the EPA's hands would be tied.