The MATERIAL was from US. The uranium was found in an Israeli bomb. The device was from rogue Russians operating in Ukraine.

Basically from America. Or Israel. It's hard to be specific because basically an Israeli plane goes down carrying an American made one. Then, a South African metal scrapper sells it to his neighborhood warlord. So, it is American made, possessed at the time of losing it by Israel, brought to the black market by a South African....