Either you accept conspiracy theory that 9/11 was inside job or you stop saying how USA is great at spying others. If they were those attacks would never happen. Highly doubt any foreign military can infiltrate any other foreign military to the point where they can neutralize it without using force. That would imply they are extremely incompetent and like we've seen during last world war, that is not the case. British secret service are especially good at data collection, analysis and protection.