Giving technical details to a foreign citizen is considered an export of ITAR or other restricted information and can get you personally locked in federal prison.
Edit: Thinking of it, getting ITAR stuff to people and places ourside the US is the point of ITAR.
"Moreover, asylees’ and refugees’ permission to live and work in the United States does not expire, and they stand on equal footing with U.S. citizens and lawful permanent residents under export control laws"
None of this is free.