IT's likely that they have a base of operations in the US somewhere, even if that's not where they are running this specific operation from it. given enough data, the FBI could likely track it down.
What if the bird will not sing?
Nobunaga answers, "Kill it!"
Hideyoshi answers, "Make it want to sing."
Ieyasu answers, "Wait."
Timelordwho answers "Just as Planned."