Editor’s note: The following is an open letter from John R. Schindler, a professor of national security affairs at the U.S. Naval War College in Newport, R.I., where he is a specialist on intelligence, terrorism, and European security issues. Prior joining the Naval War College in 2005, he spent nearly a decade with the National Security Agency as an intelligence analyst and counterintelligence officer. This article first appeared on Schindler’s blog, The XX Committee, and is republished here with his permission. Dear NSA, Hi, it’s me again. Although I left the agency a few years ago, I still think about...