A Cryptologist's Critique of NSA Reforms Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Army Gen. Keith Alexander, commander of U.S. Cyber Command, director of the National Security Agency and chief of the Central Security Service, in Baltimore, Maryland June 27, 2013. ( Win McNamee / Getty ) Produced by Jillian Weinberger Produced by PRI and WNYC