Lots of libertarians work for the US military. The US military is not a police force. Extremely unlikely. US commits terrorism but terrorism is also committed against the US and its allies, on a fairly regular basis. One of the reasons terrorism is not committed as frequently on US soil is due largely to the efforts of intelligence agencies. Osama Bin Laden had a courier who used I believe USB devices to take communications from Osama to cyber cafes, after which he sent them via the internet to various terrorist contacts, got messages back and took them to Osama where he was hiding. I don't know if the messages were hidden with steganography or encryption or what the technical details are, but during Osama Bin Ladens time in hiding after 9/11, he frequently made indirect use of the internet to engage in communications with his terror network, and apparently many of his contacts also made either direct or indirect use of the internet to transfer their communications. I don't believe Osama was caught due to signals intelligence locating his courier, but rather was caught because somebody who knew who his courier was was tortured and revealed the information, after which his courier was located and followed back to the location Osama was staying at. It seems like the CIA was probably mostly responsible for this operation, but theoretically the NSA could have located his courier with signals intelligence.   The NSA doesn't give a fuck about ordinary sheep. They also extensively spy on foreign governments. Another one of their big responsibilities is securing the USA from cyber attack.