The Obama administration has announced it will nominate Vice Admiral Michael Rogers to become the new head of the National Security Agency. Rogers is an expert on cyberweapons who leads the Navy’s Cyber Command and previously served as intelligence director for the Joint Chiefs of Staff. If confirmed by the Senate, he will replace General Keith Alexander, who is retiring. Rogers would also lead the new Pentagon unit in charge of offensive cyber-operations, despite recommendations by a presidential advisory panel to separate the two posts.