(Photo: Pablo Martinez Monsivais, AP)
(CNN) Navy Vice Adm. Michael Rogers is expected to be nominated the next director of the embattled National Security Agency, a U.S. official confirmed to CNN.
The current director, Gen. Keith Alexander, is expected to retire in March.
Alexander's tenure has been most recently marked by controversy over intelligence leaks by former agency contractor Edward Snowden about electronic surveillance.
Barbara Starr, CNN