Thanks for posting this; I'd been seeing a lot of people talking about how China was using backdoors that the FBI wanted and used, but hadn't seen anything definitive about US use of those vulnerabilities.
Also this is another reminder for me that I'm glad to be able to vote for Wyden.
Just as an FYI, "averse" is what you want there, rather than "adverse". Likely an autocorrect thing, but figured I'd mention it just in case.