The NSA is under the Department of Defense and, by their charter, provides information to the USG about military operations. You are also confusing the issue of

The NSA is under the Department of Defense and, by their charter, provides information to the USG about military operations. You are also confusing the issue of what NSA produces vs. what information they have access to. I'm also not sure that I follow this second argument. Snowden's revelations are clearly supplemental to any espionage that might have been going on against the U.S.