Iranian agents

For decades I have heard dark warnings that Iran has sleeper cells in the USA waiting for the word to do something.(*) I guess now we find out how many are ready. Or perhaps, how many are prepared to act before they discover whether their erstwhile paymasters are still in business.

(*) Not with hard evidence, just with "It's obvious that they would." And it is obvious that they'd want to try, but I'm not expert on how supply, command, and control would work on a decades-long insertion. It's probably way cheaper to fund existing networks than to create your own; though you lose the "control" part.