180518-N-UH963-111 WASHINGTON (May 18, 2018) Chief of Naval Operations Adm. John Richardson, left, presents a presidential certificate of appreciation signed by President Donald J. Trump to Adm. Michael S. Rodgers at the Washington Navy Yard. Rogers, commander of U.S. Cyber Command, director of the National Security Agency and chief of the Central Security Service, is retiring after 37 years of honorable service. (U.S. Navy photo by Mass Communication Specialist 1st Class Kevin O'Brien/Released)