BY JOE CONASON What America learned from Edward Snowden’s interview with NBC News anchor Brian Williams on Wednesday evening was much less than what we still need to know. Snowden described himself as a highly trained espionage agent, rather than a low-level hacker; he insisted his actions were patriotic, not treacherous; and said he yearns to return to the United States. He claimed to have warned his superiors about the surveillance excesses committed by the […]