Correct. And to be fair, the FBI could have received the vulnerability from a foreign state that is also opposed to terrorism but did not want their identity or

Correct. And to be fair, the FBI could have received the vulnerability from a foreign state that is also opposed to terrorism but did not want their identity or methods known. ie they may have reasons for not disclosing the vulnerability, and it's a shame that there's so much mistrust of the government [caused by actions of the government] so that we can't assume the best.